This approach, therefore, requires coding an extra loop around the interaction call just in case multiple calls are required.

因此这种方法需要围绕该交互调用编写额外的循环代码，以备多次调用之需。

youdao

Loop in extra people only when necessary.

FORBES: Using your phone for more than just calls and texts?

Experiments currently being undertaken at Stanford, and also by John Price, a physicist at the University of Colorado, will measure the force of gravity over a distance of less than a millimetre (the size of loop expected if there are only two extra gravity-swallowing dimensions).

ECONOMIST: A matter of gravity