Kate: I just want to keep the streets clean!
凯特：我只想使接到保持干净！
What I can do is just to keep it clean and dust it everyday.
我能做的，就是保持它的干净，每天为它打扫灰尘。
Just someone to keep my house clean.
就有人打扫房子。
Just like an automobile, a body needs clean fuel to keep it running well.
就像一辆汽车，身体也需要燃料来保持它的运行。
Just like an automobile, a body needs clean fuel to keep it running well.
就像一辆汽车，身体也需要燃料来保持它的运行。
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