key portions

• 关键部分

key portions的用法和样例：

例句

1. All glass vacuum tubes are the key component of solar collectors.
   全玻璃真空管是太阳能集热器中的关键部分。
2. We know that Iraq has embedded key portions of its illicit chemical weapons infrastructure within its legitimate civilian industry.
   我们知道伊拉克已将它非法化学武器基础设施的关键部分安放在其合法的民用工业里。