That's exactly what researchers at the French firm Genset think they've come up with.这正是法国基塞(genset)公司研究人员考虑的问题,他们已实现了这一愿望.Our C, CL, CLE series of genset adopt half open structure which will reduce noise much....
颊窝毒蛇的毒牙是长的空心管子.The fangs of pit vipers are long, hollow tubes.只有四分之一的蛇具有毒液和毒牙.Venom and fangs are found in only a quarter of all known snakes.在蛇的进化史上,毒牙的出现是新的进步.A more recent advance in the evolutionary story of snakes i...
The rainy days always depress me.雨天总是使我沮丧.I know he is too optimistic but I don't want to depress him.我知道他太过乐观了，但我不想令他灰心丧气。Small doses depress salivary and bronchial secretion and sweating.小剂量可抑制唾液分泌、支气管分泌及出汗....