Lockwasher
锁紧垫圈; 弹簧垫圈; 止动垫圈
🗣️ 情景例句
to schedule one hour a week--to start with.
安排一星期一个小时。
Hope is life and life is hope.
希望才有人生，人生要有希望。
If parents were prepared for this adolescent reaction,
如果家长对青少年的这种反应有思想准备，