David: Hold on. What do you mean? In what way should we change, Bill?
大卫:等一下,你的意思是?我们该怎样改进,比尔?
You hold the lower nut with one spanner while you undo the top nut with another one-do you see what I mean?
你用板手固定住下面螺母,同时用另外一把扳手拧开上面螺母,你明白的意思吗?
You hold the lower nut with one spanner while you undo the top nut with another one - do you see what I mean?
你用板手固定住下面螺母,同时用另外一把扳手拧开上面螺母,你明白的意思吗?
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