Observation hole
[机] 观察孔
🧩 词语组成解析
hole
[hol]
n. 洞，孔;洞穴，穴;缺陷;<口>绝境;
vt.& vi. （在…上）打洞或穿孔;
vi. 凿洞;（高尔夫球等）进洞;
🗣️ 情景例句
Is smoking allowed on the train?
火车上允许吸烟吗？
Move over!
坐过去一点！
It looks as if she's gone away for a few days.
好象她要外出好几天了。