Use secondary containment whenever possible

• 只要可能；使用二级

Use secondary containment whenever possible的用法和样例：

例句

1. John shows his knowlege off whenever he can.
   约翰只要可能就夸示他的学问。
2. Some young people seem to enjoy rocking the boat whenever they can.
   一些年轻人似乎只要可能就喜欢制造麻烦或捣乱。