第二次世界大战期间，美国人使用过它。
因此，同时使用多个机制可能会造成二次影响。
As such, the simultaneous use of multiple mechanisms is likely to cause secondary effects.
它被使用了两次：第一次是打开 outputText标签，第二次是将其关闭。
This is used twice: once to open the outputText tag and again to close it.
使用本程序，不可将程序变相转售，二次开发发布。
Use this procedure can not resell the program in disguise, secondary development release.
吊筐是蒸煮锅专用，蒸煮食品、肉类产品，二次消毒灭菌使用。
It have two kinds, one is common, the other is used with hoisting.
吊筐是蒸煮锅专用，蒸煮食品、肉类产品，二次消毒灭菌使用。
It have two kinds, one is common, the other is used with hoisting.
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