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重点讲解：
1. compared to 与…相比；和…比起来；
His progress at school had been unspectacular compared to his brother.
和弟弟相比，他在学校里的进步很不起眼。
2. make sure 一定要；设法保证；
You have to make sure you're comparing like with like.
你必须确保是在进行同类比较。
3. depend on 依靠；依赖；
They may hate what he does but their survival depends on him.
他们或许讨厌他的营生，但他们要想活下来必须依靠他。
4. lead to 招致；致使；导致；
This can lead to bodily weakness and muscle wastage.
这样可能会导致身体虚弱和肌肉萎缩。
