be on it

• 准备就绪

be on it的用法和样例：

例句

1. All necessary materials should be on hand.
   一切必须的材料应准备就绪。
2. I will see to it that everything is ready in time.
   我会保证任何事情都会及时准备就绪。
3. He is very skilled at pivoting on his heel.
   他能非常熟练地以脚跟旋转。
4. It takes a skilled pilot to steer the ship through.
   要使船过去需要一名技术熟练的舵手。

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