... 金属挡块 metal backup 提前挡块advance stop 挡块棘轮柄 end stop ratchet lever ...
双语例句
1
Start taking action toward your goals and stop trying to plan everything out perfectly in advance.
为你的目标开始采取行动,而不要想着事先就制定出万无一失的计划来。
2
So stop your sudoku for a minute and listen: knowing in advance where the exits are makes a dramatic difference to your chances of survival if we have to evacuate the aircraft.