同根派生 time study相关词英汉例句If you spend more time studying than cutting up, you'd get better grades.如果你能在学习上多花些工夫,而不是胡闹,你的分数会大有提高的。You could with profit spend some extra time studying the text.你多花点时间学习课文是有好处的。time study更多例句