Ehl
[医][=effective half-life(of radioactive substances)]（放射性物质的）有效半衰期
🗣️ 情景例句
to open the building for us on the next four weekends.
在往后四个周末开放那座建筑。
The wise man is always a good listener.
智者善听人言。
Yesterday my husband removed the gate and Rex got so annoyed we have not seen him since.
昨天，我丈夫把门卸了下来，雷克斯很生气，此后我们便再也没有见到它。