珊瑚虽然看上去坚固，实际上非常易碎。Although the coral looks hard, it is very delicate.珊瑚有黄色的、蓝色的或绿色的。Coral can be yellow, blue, or green.愿上帝保佑那些船员吧,他们早就变成珊瑚了. ”God help the poor souls that manned her - coral long ago.'...
Canned varieties of beans and pulses are a good standby.各种豆类罐头制品是很好的常备食品。electrical pulses zinging down a wire迅速通过电线的电脉冲A string of electrical pulses is often shown as this.一列电脉冲经常表示成这样....