It is effective to wash its tube pass with some solution and its shell pass with acid.
为此，配制一定浓度的溶液分别对表面冷凝器壳程进行药洗、管程进行酸洗，取得了良好效果。
The second quirk is that you cannot pass arbitrary shell commands in.
第二种状况是您不能传入任意shell命令。
The shell has to be slightly porous to enable oxygen to pass in.
外壳不得不有些细小的孔以便能使氧气通过。
The shell has to be slightly porous to enable oxygen to pass in.
外壳不得不有些细小的孔以便能使氧气通过。
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