"Often playing computer games is bad for us"
It is bad for us to play computer games very often.
使用It形式主语比较符合书写习惯，直译的话也可以：
To play computer games frequently is bad for us
Playing computer games frequently will do bad to us
但是刹那间,我便把这种和平相处的念头打消
你好
Often play computer games for us to do harm
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