ensure是动词,没有副词
例句
1、
Ensure there is a free flow of air around the machine.
要确保机器周围空气畅通。
2、
Use a black pen on white paper to ensure good reproduction.
用白纸黑笔,以确保复印清晰。
3、
They could not ensure a smooth transfer of political power.
他们无法保证政权的顺利交接。