这个检测方法的检出限非常低，只有0.1微克。

The ___L.O.D. of this testing method is as low as 0.1 micrograms.

这名消防员在执行救援任务时因公殉职。

The firefighter died in the ___line of duty during a rescue mission.

商务旅行期间，公司将承担你的差旅费用。

The company will cover your ___LOD during the business trip.