activating signal

The scanner emits a low frequency radio signal, activating the microchip.

扫描仪会发出一些低周波的无线电信号, 来激活微芯片.

Lifebuoy self-activating smoke signal

救生圈自发烟雾信号

One molecular mechanism of skin photoaging is that UVA and UVB induce MMPs gene transcription of epidermal keratinocytes and dermal fibroblasts through activating cellular signal transduction pathways.

皮肤光老化的分子机制之一，是UVA和UVB通过激活细胞信号转导通路诱导表皮角质形成细胞和真皮成纤维细胞MMPs的基因转录。

Arranged signal activating lock circuit and time-base control circuit in the sound wave receiving circuit to take the initial signal of back wave as the valid one in the cycle, thus to improve the ratio of signal vs. noise and detective precision.

在超声波接收电路中设有信号触发锁定电路和时基控制电路。实现以各探头中最早收到的回波信号为本检测单元的有效信号，有效提高信噪比和检测精度；

Signal unit initial alignment-invokes initial alignment prior to activating or restoring a signaling link.

信令单元初始定位--在激活或恢复信令链路之前调用初始定位.