He speaks passably good French.

他法语讲得还可以。

She has always been quick to pick things up, doing passably well in school without really trying.

她学东西向来很快，不用多努力书就能读得还不错。

Nearly all of them speak passably.

他们差不多所有的人都讲得还不错。

Sometimes for a day or two he would be almost sober and attend to his work at least passably.

他偶尔也会清醒一两天，勉强将自己分内的活干得像回事。