When you decide to do something, stick to it.

　　當你決定做某事時，要堅持到底。

　　So it made sense to decide to do something together.

　　所以我們兩方決定攜手合作也就在情理之中了。

　　I decide to do something different this term.

　　這個學期我想做些不同于以往的事情。

　　I just hope the next time you decide to do something, you include me.

　　下次你要做什么，請讓我知情。

　　It's not being able to decide what way to do something.

　　是無法決定用什么方法去做一件事。