黑色塑料膜的作用是密封，而门的重量会把它压住。
The black plastic will help seal and the weight of the door holds it down.
这样的“门”深足以让摩尔定律发挥多几年的作用。
Such a gate length would keep Moore's law rolling for several years.
结论该门起到了很好的防辐射作用。
Conclusion This door has played very good radiation protecting function.
地球科学是一门实践性科学，实践教学在人才培养过程中具有至关重要的作用。
Earth science is practice science. Practice teaching takes very important role in talents cultivation.
第三部门在社会管理中具有特殊的地位和作用。
The tertiary section plays a special part in social management.
数学作为一门基础学科，在体育学校教育中起着举足轻重的作用。
As one basic subject, mathematics hold the balance of physical training school.
数学作为一门基础学科，在体育学校教育中起着举足轻重的作用。
As one basic subject, mathematics hold the balance of physical training school.
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