Eugenics has a biological significance.优生学具有生物学上的意义.A distinction is often made between " positive " and " negative " eugenics.对 “ 积极 ” 优生学和 “ 消极 ” 优生学往往加以区分.An example of negative eugenics would be the attempt to eradic...
Always buy a heater with thermostat control to save on running costs.始终购买可调温度的取暖器以节省使用成本。If our environment cools, then messages from the skin alert the body's thermostat.如果外在环境变冷，体表会将这一信息传递给身体的体温调节中枢。The thermostat...
There have been several volcanic eruptions this year.今年火山爆发了好几次.Over 200 people have been killed by volcanic eruptions.火山喷发已导致200多人丧生。The later eruptions were less violent and caused no significant damage.后来的几次喷发就不太猛烈了,也...
It was just when geography was really beginning to change and lots of new ideas were coming in...那时正是地理学真正开始发生改变、许多新观念兴起的时候。There are four major disciplines in earth sciences, namely geography, geology, geophysics and ge...
Bakers form dough into loaves.面包师把生面做成大面包.Bakers bake in huge ovens.面包师用大烤炉烤面包.The bakers specialize in catering for large parties.那些面包师专门负责为大型宴会提供食品.To serve the needs of bakers, manufacturers ferment the yeast to produ...
Many of the garments have the customers' name tags sewn into the linings.这些衣服有很多内衬上缝有顾客的姓名签。Its linings were simply squirted with oil.它的内衬只是简单地喷了些油。Tank Linings and pipe Coatings: Ballast and potable water tanks; Bi...