Sit tight; you may do worse by changing your position.
坚持自己的主张，因为改变立场可能更糟。
Tight all closures and put the valve cover door on position before shipment.
运输前拧紧所有密封件，盖好阀门挡板。
You hold your shears with a tight grip in a thumb up position.
你习惯于大拇指紧握的握剪姿式。
You hold your shears with a tight grip in a thumb up position.
你习惯于大拇指紧握的握剪姿式。
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