keep on top of

• vt. 保持优势

keep on top of的用法和样例：

例句

用作及物动词 (vt.)

1. 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。