that - is的反義詞

反義詞是this is，例如：

1、This is the one major drawback of the new system.這是新系統的一大弊端。

2、This is one of the most commonly used methods.這是最常採用的方法之一。

3、This is just one of a whole complex of issues.這僅僅是所有相關的問題之一。