他曾轻率地说过什么吗？Had he been indiscreet in what he had said?有时候他们因自己的轻率而搭上性命。Occasionally they paid for their indiscretion with their lives.他怎么能如此轻率？How could he be so indiscreet?...
化学家能把一种药物的各种成分分解出来.A chemist can separate a medicine into its components.化学家用电解法把水还原为氢.The chemist reduced water by electrolysis.了解这些稀有分子能帮助化学家找到可实现的目标。Understanding these rare molecules will help chemists to find out wh...
Cut openings in sheets for outlets, vent pipes, flues, etc. to the minimum size necessary.削减开口,为产品的店铺时, 排气管, 烟道等,以最小面积必要的.A plugs, socket - outlets, adaptors and connection units - Part 3: Specification for adaptors.A插头 ...