external反义词为internal
例句
1、
The techniques of internal management will assuredly change.
毫无疑问，内部的管理技术也会改变。
2、
The medicine is not for internal use.
这种药不可内服。
3、
A combination of internal and external factors caused the company to close down.
内外因结合导致了公司的倒闭。