Helper objects, on the other hand, are always contained within some item, and all references to helpers are containment references.

另一方面，Helper对象始终包含在某个项中，并且对Helper的所有引用都是包含引用。

youdao

Spotting Madame Leyli, the company's very kind and competent chief helper, I instinctively stretch out a hand to shake hers.

ECONOMIST: Elections drive a man to drink