Foolproofness
安全装置
🗣️ 情景例句
Now point to the buildings.
现在请指着那些建筑物。
If the hen does not prate,she will not lay.
不叨叨的母鸡不下蛋。
They were expecting their sixth child and were faced with even more pressing economic problems.
第6个孩子即将问世，他们面临着更为严峻的经济问题。