Second, since the radius vectors r to the extreme points of the ellipse satisfy(5. 3-12)they are parallel to the two allowed d vectors . 其次，因为到椭圆极值点的径向矢量r满足式（53-12），故这两个径向矢量与两个允许的D矢量平行。
In addition to wright, two german-born americans, watter gropius and mies van der rine, contributed greatly to this new style . 除了怀特，另外两名美籍德国人，瓦尔特，格罗皮斯和梅斯万德洪，也为这一新风格的形成与发展做出了巨大贡献。
Either she had been all long unaware of having skirted disaster, or else she had lost sight of it in the triumph of the van der luyden evening . 对掩盖着的灾难，她好象如果不是自始至终蒙在鼓里，那就是在范德路易登家的晚宴上被胜利冲昏了头脑，再也看不见险情。
"mr. van der luyden," the butler continued, "is in, sir; but my impression is that he is either finishing his nap or else reading yesterday's evening post. " “范德路易登先生在家，先生，”管家接着说，“不过我猜想，他要么快睡完午觉起来了，要么在读昨天的晚报。”
I ' d like it for a keepsake . is that all rightwithyou 我想留做个纪念没问题吧？
You ' d better feed this old bread to the ducks 你最好以新不新鲜的面包喂养鸭子。
B : i ' d love to go , but i insist we go dutch 我很愿意去，但我坚持我们各付各的。
You heard the d urberville coach , perhaps 你也许听说过德贝维尔家的马车的故事。
I think i ' d better leave now . it ' s getting late 我想现在我该走了。天色已晚了。
You ' d better explain the sentences to him again 你最好再给他解释一下这些句子。
