a slack vowel的用法和样例：
- January is always a slack period.
- January is always a slack period .
- A slack pace He tightened a few slack screws.
- The horse was moving at a slack pace.
- One who performs on a tightrope or a slack rope.
a slack vowel的相关资料：
Aotogi a A Survey on Portfolio Management A Sect of Landscape Architeclure A Single Page Printing Framework A ceremonial review of troops. A Technology Analysis of NEPTUNE A declaration or an assertion. A disrespectful act or remark. A pollof the viewing audience. A success through and through. a shopping/fishing expedition