与水平安定面相连的是两个称为 “ 升降舵 ” 的可动操纵面.Attached to the stabilizers are two movable surface called " elevator ".俯仰力矩的变化由升降舵的偏转来提供.A variable pitching moment is provided by moving the elevator.飞机的升降舵可以使它升降自如.The elevator of an airc...
我们现在的工作多半是承办婚宴。Most of our work now involves catering for weddings.你儿子的婚宴是由谁承办的？Who did the catering for your son's wedding?婚宴上经常有水果供应。The fruit was often served at wedding feasts....
Last year, he mailed the documents to French journalists...他去年把这些文件寄给了法国记者。Last year, he mailed the documents to French journalists.他去年把这些文件寄给了法国记者。Jamie e-mailed me to say he couldn't come...杰米给我发了电子邮件，说他不能来了。He ma...
Experiment on the transesterification of jatropha curcas oil with p - toluene sulphonic acid as catalyst was studied.实验研究了麻疯树油在对 甲苯 磺酸催化剂的作用下与甲醇发生转酯化反应生成脂肪酸甲酯(生物柴油)的情况.Isopropyl p - hydroxybenzoate was synthesized with t...