The ability to use light to turn specific cells on and off with very precise timing could in principle allow new therapies.
这种用 激光射线打开破损细胞的通道，以精确的瞄准杀死细胞的技术在工作原理上得到了大家的认可。
2
They may do so later on, but timing for that could be off.
或许稍后他们会这么做，但是已经错过了时机。
3
The effects of converter position, ignition timing and idle speed on catalytic converter light-off behavior were studied on an electronically controlled LPG injection engine.