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
so I can study it.
以便我好好研究。
Take a pain for a pleasure all wise men can.
智者皆能视苦为乐。
Once he had done this, he had been able to turn on the supply.
一旦他接上了接头，他就能够打开供气阀。