dip your toe in the water
試水一下，初步嘗試
口語·表示謹慎嘗試新事物
英文釋義
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.
典故來源
源自游泳前用腳尖試水溫的舉動，比喻謹慎地開始新嘗試，避免冒進。