I'm determined to start exercising
下定决心───Make up your mind;锻炼───physical exercise
You must make up your mind.───你必须下定决心。
Make up your mind about the job you really want.───你真心真意想做的工作打定主意。
Well, make up your mind. Which do you want? This one or that one?───哎，拿定主意。你要哪一个？这个还是那个？
Life is just a series of trying to make up your mind. ---Thomas Fuller, English churchman and historian.───生活只是由一系列下决心的努力所构成---托马斯.富勒，英国教士和历史学家。
is just a series of trying to make up your mind .───生活只是一个不断努力，下决心的过程。
Before you make up your mind, ask the bank for the best account for your needs.───在你决定之前，请你查询银行最适合你需求的帐户。
For God's sake stop dithering and make up your mind!
It's now or never, so make up your mind.
Oh, do stop vacillating and make up your mind!
Well, make up your mind. Which do you want? This one or that one?
Stop dithering and make up your mind.