Changing of crankcase oil
[建] 换曲轴箱油
🧩 词语组成解析
v. 交换；兑换；改变（change的ing形式）
of
[əv]
prep. 关于;属于…的;由…制成;
aux. 助动词 [非标准用语、方言] =have [主用于虚拟语气];
n. 曲轴箱\\n[建] 曲柄箱
oil
[ɔɪl]
n. 油;石油;油画;燃油;
vt. 给…加油;
vi. 化成油;
🗣️ 情景例句
My pleasure, Doctor.
非常荣幸，医生。
We've got to get a sofa and a chair for the living room.
我们必须有一张沙发和椅子放在客厅。
All the Indins over the age of 8 had to carry their permits at all times.
所有8岁以上的印度人无论什么时候都得携带许可证。