半心半意

半心半意 [bàn xīn bàn yì]

1. ■ half-hearted; lukewarm; not with all one's heart:

他只是半心半意地支持我们的计划。 He gave only lukewarm support to our plan.

我们要全心全意地做这件事， 而不是半心半意。 We must do it whole-heartedly， not half-heartedly.