A roller bearing
滚柱轴承
🧩 词语组成解析
🗣️ 情景例句
Nothing flashy or expensive.
不是什么俗丽或昂贵的。
The (or A) beggar may sing before the thief (or footbad).
既是穷光蛋，何虑窃贼偷。
If, at the time, the British had not feared invasion, it would have been completed.
如果不是因为那时英国人害怕入侵，隧道早已建成了。