单词：helium injection
helium injection的用法和样例：
例句
- Note that sonication was less effective than either helium or vacuum treatment.注意超声比通氦或者真空处理的效果要差。
- In my laboratory, helium sparging is the degassing technique of choice because it is simple and effective.在我们实验室，用的是通氦脱气方式，因为它简单又有效。
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