半时

I was annoyed by hecklers during the last half of my speech.

我在作后半部分报告时,对质问者感到厌烦。

Her words were inward and indistinct when she was in a state of half unconsciousness.

"她处于半昏迷状态时,她说话的声音低沉,模糊不清。"

The influence of the semibreadth of light source upon the measurement accuracy of the concentration of the solution is primarily discussed and then a corresponding expression is given in this paper.

本文对光源的半宽度在测量种溶液浓度时对其测量精度的影响进行初步地探讨，并给出一个相应的表达式。