Our main concern is to provide quality customer service.

　　我們最關心的是為顧客提供優質服務。

　　The data is limited in terms of both quality and quantity.

　　這份資料在質量和數量上都很有限。

　　Does the quality of teaching depend on class size?

　　教學質量取決于每個班的人數嗎？

　　She acts well but she hasn't got star quality.

　　她演得不錯，但缺少成為一個明星的素質。

　　This model represents the best compromise between price and quality.

　　這種型號是價格和質量間的最佳折中方案。