1

脚踏两条船

jiǎotàliǎngtiáochuán

lit. to stand with each foot in a different boat (idiom) fig. to have it both ways to run after two hares (especially) to have two lovers at the same time

2

必定

bìdìng

to be bound to to be sure to

=3

落空

làkòng

to omit; to neglect (to do sth) to miss a chance; to let an opportunity slip by

=3

落空

làokōng

to fail to achieve something; to be fruitless

=3

落空

luòkōng

to fail; to fall through; to come to nothing