Impurity defect
[化] 杂质缺陷
🧩 词语组成解析
🗣️ 情景例句
You have to ask for my father's permission.
你必须征得我父亲的同意。
That house is for sale. It has central heating.
此房出售，房子里有供暖设备。
A 55-storey building went up in 1913, and in 1931 the Empire State Building was completed, then the tallest building in the world.
1913年一座55层高的大楼拔地而起。1931年帝国大厦竣工，这在当时是世界上最高的大厦。