I can only afford to watch television for an hour gonight because I have homework to do.
因为我要做家庭作业,所以今晚我只能花一小时看电视。
Shortly after this the famous H. M. S. Challenger expedition established the study of the sea-floor as a subject worthy of the most qualified physicists and geologists.
此后不久,英国著名的“挑战者”号舰艇对海底的那次考察,把对海床的研究确立为一个值得一流物理学家和地质学家从事的研究课题。