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。
Come up with a special hand signal or give your helper the OK to deliver a swift kick under the table to curb your interrupting ways.
可以想出一个特殊的手势或者允许你的帮手在你打断别人时在桌下及时踢你一脚。
Long-term use can effectively extend the life span of bearings, it is a good helper for the dentists to maintenance the hand-piece.
长期使用可有效延长轴承的寿命，是牙科医师保养手机的最好帮手。
Long-term use can effectively extend the life span of bearings, it is a good helper for the dentists to maintenance the hand-piece.
长期使用可有效延长轴承的寿命，是牙科医师保养手机的最好帮手。
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