Daniel: Hello, is it necessary to do warm-up exercise?
听看学丹尼尔：你好，必须做热身运动吗？
First let's do the warm-up exercise.
首先让我们做热身练习。
He always begins his lessons with a warm-up exercise.
他讲课前总是先让学生做预备练习题。
To get a satisfactory result, players will always have to do sufficient warm-up exercise before the race.
为了取得理想的成绩，选手们在比赛之前总要做充分的热身运动。
B: I'm sorry. Every customer coming here must do the warm-up exercise before getting down to swimming.
对不起，任何一位到我们这来的顾客在下水游泳之前必须要做热身运动。
B: I'm sorry. Every customer coming here must do the warm-up exercise before getting down to swimming. That's out regulation.
对不起，任何一位到我们这来的顾客在下水游泳之前必须要做热身运动。这是我们的规定。
Daniel: Hello, is it necessary to do warm-up exercise? I can't wait to dive into the water.
听看学丹尼尔：你好，必须做热身运动吗？我想立马下水。
Daniel: Hello, is it necessary to do warm-up exercise?
丹尼尔：你好，必须做热身运动吗？
Daniel: Hello, is it necessary to do warm-up exercise?
丹尼尔：你好，必须做热身运动吗？
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