Before the race, he is fine. But afterwards he is worn out.赛前他状态很好，赛后就筋疲力尽了。"You're worn out, Laura," he said. "Go home and get some rest."“你太累了，劳拉，”他说，“回家休息一下吧。”These shoes are worn out.这双鞋破得不能再穿了。...
The method is presented for preparation metasilicate pentahydrate from residue after extracting magnesium from serpentine ore.以蛇纹石提镁残渣为原料,采用常压蒸馏法直接合成了六配位有机硅化物.Gold ore main type is auriferous quartz vein type.金矿床主要为含金硫化物...
乔安妮刚学会跳水。Joanne had just learnt to dive.大伙儿在游泳比赛前欣赏了跳水表演.The crowd enjoyed a diving display before the swimming races.跳水时腿要伸直.When you dive, you must keep your legs straight....