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1·For keeping tank pressure in design range, some of boil off gas need to be released form tank through boil off gas treatment system in order to control tank pressure.

而大型储罐的承压能力是较低的，为了保证储罐内的压力在设计允许范围内，需要通过蒸发气处理系统排出部分蒸发气以控制罐内压力。

2·Turn off the gas - the soup is about to boil over.

把关掉煤气，汤要溢出来了。

3·Galvanized sheet is readily spot- or seam-welded, but arc gas welding will boil off the zinc coating.

镀锌板上有焊点或焊缝，但是电弧焊会烧掉锌层。