Lockwasher
锁紧垫圈; 弹簧垫圈; 止动垫圈
🗣️ 情景例句
For example, did you know that 1 in 4 teenagers has tried marijuana?
比如，你是否知道4个青少年中就有1位曾经吸过大麻？
A book that remains shut is but a block.
有书闭卷不阅读，无异是一块木头。
Why don't you come swimming with us?
你干嘛不和我们一起游泳呢？