You can really work up a sweat doing housework.做家务真的会让人大汗淋漓。Why do you leave all the hard work up to your mother?你为什么把所有难做的事都留给你母亲?They will work up all these stones in building the bridge.他们将把这些石子全部用来造桥....
You cannot take a day off without authorization.未经批准你不得休假。It's annoying to have to get authorization for spending such piddling amounts of money.花这麽一点钱也要去请示,真烦人.Formal authorization for the trip was given last week....
This paper investigates the integrable inhomogeneous generalized Heisenberg ferromagnet model by using the prolongation structure theory.摘要利用延拓结构研究了可积的非均匀推广的海森堡铁磁链方程.Bohr's unposted letter was written in response to...
基本上有两种，用外行话说就是青石棉和白石棉。There are basically two types called, in layman's terms, blue and white asbestos.三种最主要的品种是温石棉, 青石棉和铁石棉.The three most important varieties are chrysotile, crocidolite and amosite.强度按青石棉,温石棉, 铁石棉...