The body can resorb the calcium from bones if needed.

身体在需要时可以吸收骨头中的钙。

It's reassuring to know that help is available if needed.

知道在需要时有帮助可得是令人安心的。

You can substitute kirsch with another fruit brandy if needed.

如果需要，你可以用其他水果白兰地代替樱桃白兰地。

The hospital transfers patients to specialized facilities if needed.

医院在需要时会转移病人到专门的设施。

We have a team on standby to assist with the project if needed.

我们有一个团队在待命，以便在需要时协助项目。

The school policy allows students to ask for a regrade if needed.

学校政策允许学生在需要时请求重新评分。

The garden features semipermanent structures that can be moved if needed.

花园里有一些可以根据需要移动的半永久的结构。

Bicycles are available if needed.

如有需要，可提供自行车。

Compile some hooks, if needed.

如果需要，编写一些hook。

Referral will be made if needed.

有需要时医生会转介其他的医生。