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
Karaoke isn't really a performing art.
卡拉 OK 不算是真正的表演艺术。
There is a mole under the ground.
地下有一只鼹鼠。
its movement would be recorded in ink upon its surface.
纸的表面就会用墨水记录下地板运动的情况。