Add to include search path的用法和样例：
- Moreover, for shared library systems, usr local lib must be added to the runtime library search path.
共程序库系统需将usr local lib追加成程序库查找路径。
- I have nothing to add to my earlier statement.
- The book ought to include a bibliography of the subject.
- I didn't want to add to Mother's misery.
- The editors saw fit to include some illustrations in the textbook.