当生活很艰难，你想要放弃的时候，请记住，生活充满了起起落落，如果没有低谷，那站在高处也失去了意义。When life gets hard and you want to give up, remember that life is full of ups and downs, and without the downs, the ups would mean nothing.我真的不理解这到底有什么意义，简直是愚蠢透顶。I don�...
孩子们在周围乱跑，让所有人都很烦。The children were running about under everybody's feet.我出去在周围散了一会儿步。I went out and had a walk around.他们划出一小块地皮用于建造儿童游乐场,并在周围打上了木桩.They've set aside a small area as a children's playground ...
成功无法保证，并非唾手可得。成功必须靠自己去争取。Success is not guaranteed. It is not handed to you. Success is earned.他14岁起就知道自己日后干什么了。He knew what he wanted to do from the age of 14.她重振旗鼓去开创自己的事业了。She dusted herself down and left to build her...
The infra - red spectra of quinones present a number of interesting features.醌类的红外光谱具有一些有趣的性质.Ethylene and trans - dichloroethylene are both inactive in the infra - red in this region.乙烯和反式二氯乙烯在红外光谱的这个区域都无活性.Infra - red ...