Sighthole
n. (测量用仪器等上的)观察孔,检查孔,窥视孔
✅ 同义词
🗣️ 情景例句
Grandpa,
爷爷，
I'm sorry to keep on coughing.
我不停地咳嗽，真是抱歉。
This time he was barking so that someone would let him out! Since then, he has developed another bad habit.
这次它叫着让人把它放出去！从那以后，它养成了另外一种坏习惯。