dip your toe in the water
试水一下，初步尝试
口语·表示谨慎尝试新事物
英文释义
to try or experience something new or unfamiliar, usually in a cautious or limited way
例句
Before investing heavily, she decided to dip her toe in the water with a small trial.
典故来源
源自游泳前用脚尖试水温的举动，比喻谨慎地开始新尝试，避免冒进。