便秘时可服用泻剂.If you're constipated you may need a laxative.酒石酸及其钾盐是有渗透作用的泻剂.Sodium potassium tartrate and tartaric acid are osmotic laxatives.您需要服食泻剂来驱使肠胃的蠕动?Do you depend on laxatives to ease your bowel movements?...
If you've got bags you're better off taking a taxi.你要是大包小包的，不如打的算了。They are much better off than us.他们比我们富得多。He found himself no better off than any of his compeers.他发觉自己比其他所有的同伴都好不了多少....
In other words, The Hermiticity of a matrix is invariant under unitary transformations.换言之, 矩阵的厄密性在幺正变换下保持不变.A matrix of this sort occurs, for example, in electric networks when mutual inductance is present.例如, 当电网络中有互感时...