雄性动物在求偶时会尽量展示自己，并发出一些声响。Courtship is somewhat vocal with a lot of displaying by the male.鸟类和兽类常在春天求偶.Birds and wild animals often pair in the spring.鸟儿求偶的表现包括雄鸟抖松羽毛的炫耀行为.Courtship will include displays in which the male ...
这些粗野的小子应该用马鞭狠狠抽一顿。These young louts deserve to be horse-whipped.他将它们捆起来，然后用马鞭抽打，以“驯服”这些猎物，然后把它们送到动物园去。He tied them up and then horsewhipped them, to "tame" his catches before sending them off to zoos.妈妈为此还说男人都是好色之徒,像杰弗里这...
最普通的精加工工序是用机械的方法, 如研磨, 磨削或用磨料抛光.The most common finishing operations are mechanical, such as milling, grinding, or polishing with abrasives.实验中采用磨料磨损的方式.Abrasion wearis taken as the main wear mode in the experiments.磨料水射...
解释为什么钡能形成过氧化物而铍则不能。Explain why barium forms peroxide but beryllium does not.然而铍的毒性限制了它的作用.However the toxic properties of beryllium limit its application.但如果用铝包覆铍,则可避免加工过程中及储存期间的中毒问题.Toxicity problem in manufacturing and...
The chemistry and electrochemistry of lithium electrolyte salts are introduced.介绍了锂离子电池电解质锂盐的化学和电化学.The principle, electrolyte formula and parameter of brass electrochemistry etching are introduced.文中介绍了黄铜电化学蚀刻的原理 、 电解液配...
Capstan imagesetter of laser sources stay, the exposure light deflection rotation by galvanometric or Prism � � s.绞盘式照排机的激平平源变不静不不静, 曝平平线的偏不停靠振镜或棱镜不静弹来达成.Capstan imagesetter of laser sources stay, the exposure light rota...