triggering factor

TP was determined as the primary factor triggering the regime shift of shallow lake ecosystem.

确定总磷是浅水湖泊生态系统稳态转换的最主要驱动因子。

A strong and sustained southward IMF direction is a key factor in triggering geomagnetic storms.

强劲持久又指向南的IMF,是引发地球磁暴的关键因素.

High concentration of reactive oxygen in seed might be closely related with fruit ripening, and H_2O_2 might be an important factor in triggering the senescence.

种子中活性氧的产生能力高于果肉，种子中高浓度的活性氧含量可能与果实的成熟衰老过程有关，H2O2可能是启动果实衰老的一个重要因子。

Even a problem as simple as a bad back often has an underlying triggering factor.

甚至像背疼这样的小问题都常常有潜在的诱发因素。