英语翻译最好口语化一点；1,我在组装机器,关键是连杆位置要放恰到好处.2,这一步是关键.3,他正在测试这台机器的压力平衡.4,这台机器不能/能测试通过.

1 , I assemble the machine , it is critical rod position to put right.
2 , this step is crucial .
3 , he is testing this machine pressure balance .
4 , this machine can not / can test.

1, I in the assembly machine, is the key link to put the right position.
2, this step is the key.
3, he is testing the pressure balance of the machine.
4, this machine can't/can test pass.

I am asembling the device ,the main point is that the conbination is at the right place.this step is critical he is testing the pressure balance of the device .the testing of the device don't pass

1, I'm in assembling the machine, the key is to be just perfect linkage position.
2, this is a key.
3, the pressure balance he is testing the machine.
4, the machine can't / can test.