An example of negative eugenics would be the attempt to eradicate a harmful recessive gene.消极优生学的范例是试图破坏一种对人体有害的隐性基因.These insects are very difficult to eradicate.这些昆虫很难根除.It'set out to eradicate heresy, and ended b...
植物的肺就是其叶片上微细的气孔。A plant's lungs are the microscopic pores in its leaves.在干旱的条件下, 叶子的膨压减少而气孔关闭.Under conditions of water stress, leaf turgor decreases and stomata close.他使橡胶塞牢固地塞进盖上的排气孔.He presses the rubber stopper ...
The outside air was heavy and moist and sultry.外面的空气沉滞、潮湿而闷热。My mind travelled back to a hot sultry day in the little town.我的思绪回到从前在这个小镇上度过的闷热的一天.The sultry weather in the tropics encourages tourists to lead an indolent ...