单词：keep on top of
保持优势
keep on top of的用法和样例：
例句
用作及物动词(vt.)
- Thousands of people have to put more time and energy on learning new technique and knowledge inorder to keep on top of the employment market.成千上万的人们不得不花费更多的精力和时间学习新的技术和知识，使得他们在就业市场能保持优势。