The ( ) often help us with the machine.(engine)适当形式.

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The()oftenhelpuswiththemachine.(engine)适当形式.The()oftenhelpuswiththemachine.(engine)适当形式.The()oftenhe

The ( ) often help us with the machine.(engine)适当形式.
The ( ) often help us with the machine.(engine)适当形式.

The ( ) often help us with the machine.(engine)适当形式.
engineer
工程师