Get in the water and swim (or tread water) for 2-3 minutes to get your body warmed up.
下到水里游泳或踩水2至3分钟来唤醒你的身体。
If you've ever watched a lifeguard approach a person who is drowning, you will see the lifeguard swim out to the person and then just tread water.
要是你以前看过救生员靠近溺水的人，你会看到救生员游到那个人身边，只是在踩水。
If you can't get back to the beach, tread water and wave for a lifeguard's help.
假如你无法游回岸边，可踩水并向救生员挥手求救。
EXAMPLE: During its early years the new little company was just able to tread water. Expenses were paid, but no profit was achieved.
这家公司在刚开业的最初几年只能勉强生存。除去开支之后，根本没有利润。
EXAMPLE: During its early years the new little company was just able to tread water. Expenses were paid, but no profit was achieved.
这家公司在刚开业的最初几年只能勉强生存。除去开支之后，根本没有利润。
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