chock
n
block or wedge used to prevent a wheel, barrel, door, etc, from moving (用以防止轮子、 桶、 门等移动的)垫块. chock, v [Tn]
wedge (sth) with a chock or chocks 用垫块塞住(某物).
🗣️ 情景例句
I know so.
我确定知道是这样。
Here are the two originals of the contract we prepared.
这是我们准备好的两份合同正本。
If you learn even a little English, you will find it usedful after you leave school.