periodically

I have prickly and burning ulcers in the mucosa, it happens periodically.

我口腔粘膜上的溃疡有刺疼和灼烧疼, 周期发作.

More than half of Chinese men smoke and many of the country's cities are periodically blanketed in toxic smog, so millions of people are expected to develop respiratory illnesses in the coming years.

中国有一半以上的男性吸烟，还有多座城市时常笼罩在有毒雾霾中，因此未来这些年预计有数百万人会罹患呼吸系统疾病。

Hurricanes periodically menace the Gulf Coast.

飓风常常威胁着墨西哥湾海岸.

He drinks far more than she, and is periodically rebuked.

他喝酒比她厉害得多, 为此,有时受到她的责怪.

Periodically, Churchill sinks into spells of depression.

邱吉尔的情绪会周期性落入低潮.

The new type truck mounted periodic additive adding unit has been developed and manufactured. SRH 02 corrosion inhibitor is put into action periodically.

采用开发研制的新型车载式周期性加药装置，定期投加SRH-02缓蚀剂。

Police were periodically patrolling the area.

警察定时在这一地区巡逻。

The rate of interest payable on tax reserve certificates is periodically revised in line with market trends.

储税券利率会跟随市场利率走势而定时作出调整。

A loan in which the interest rate is adjusted periodically during the term of the loan based on a pre-selected index and time adjustment.

利率在贷款期间按照预先确定的指标和时间不时调整的贷款。

Invading woody vegetation, especially of the same species, should be controlled periodically to prevent confusion.

入侵的木本植物, 特别是同一种类的, 应当定期地除去,以防止混杂.

Dynamic RAM's need to be refreshed periodically.

动态RAM则需要周期性地刷新数据.

Violent winds periodically drive clouds of dust around Mars.

狂风间歇地席卷火星上的尘云.

The simplest imposed conditions are those in which the loading is periodically and uniformly repeated.

最简单的加载情况是周期地、均匀而重复地施加的载荷.

It is recommended that all persons traveling on air flights, irrespective of which class they are in, drink lots of water and move their legs by walking whenever possible and by periodically flexing to minimize the risk of economy class syndrome.

一般建议所有搭乘飞机的乘客，不管是头等舱、商务舱还是经济舱，都要多喝水，有可能时就要走一走活动双腿，定时扭扭脚踝，转转膝盖和臀部，尽量减少患上经济舱综合征的风险。

Periodically , the lamellae become enlarged, forming flattened, membrane-enclosed vesicles called thylakoids.

片层周期性地扩展, 形成扁平的有膜为界的囊,称为类囊体.

Inspectors periodically check wiring, heating plants and chimneys.

检查员定期检查电线系统, 暖气设备和烟囱.

The analysis of telecommunication system of periodically fluctuating traffic flow

具有周期起伏业务流的电信系统的分析

Mount Baker periodically heats up internally.

贝克山有周期性内部发热现象.

Melting and freezing problems involving multiple phase change moving boundaries of phase change materials ( PCM) in thermal storage systems under periodically heating cooling boundary condition of the third kind are modeled, and the transient temperature distributions and phase front time marching images in PCM are obtained.

对一类热储能系统中，相变材料在周期性加热冷却第三类边界条件下出现的多重相变运动边界问题进行了模拟，得出了系统内部瞬态温度分布及相变界面随时间推进的变化图象。

Villagers'committees regularly or periodically make public the affairs of the village to the villagers.

村民委员会将村务定期或不定期地向村民公开.

It loops until shut down, periodically showing and hiding itself for brief periods.

它循环运行，直到被关闭，它周期性地短暂显示和隐藏自己。

The geyser erupts periodically.

间歇泉周期性地喷发.

The modified gain extended Kalman filter is employed in the state estimation and the target acceleration vector is periodically calculated in a recursive manner.

BOT的状态估计采用修正增益扩展卡尔曼滤波器（MGEKF），目标加速度采用周期递推估计。

Economic dislocations such as " the Panic of 1837 " occurred periodically during the 19 th century.

十九世纪曾周期性地发生象 “ 一八三七年恐慌 ” 那样的经济失调现象.

Mailing lists are updated periodically.

邮寄名单定期更新。

Windows pop up periodically, each presenting a picture or video of a scenario, such as a Palestinian suicide bombing or an Israeli air strike, likely to trigger a response.

一些窗口将每隔一段时间弹出，每个窗口都展示一章相关图片或是一段视频，比如一个巴勒斯坦人发起的自杀式袭击或者以色列的空袭，等等一系列引发的反应。

Meetings are held periodically to monitor progress on the case.

定期举行会议以监督案件的进展。

The heat transfer in continuous casting of Tin was calculated with this model, it was found that temperature of initial solidification area was varied periodically along with mold oscillation.

在此基础上，模拟了结晶器振动条件下的锡液初始凝固传热行为，发现锡连铸中，初始凝固区域温度随结晶器振动而发生周期性变化。

The magnesium anode rod should be inspected periodically and replaced when necessary to prolong tank life.

应该定期检查阳极棒，为了延长热水器的使用寿命，在必要时，更换阳极棒。

Economic crises recur periodically.

经济危机周期性地发生.