他必须努力学习以保持他在同学中的领先地位。
He had to work hard to remain ahead of his classmates.
youdao
请保持安静！他正在尽力学习。
Please keep quiet! He is trying to study.
如果他对学习英语感兴趣，他会和我保持联系的。
Should he be interested in learning English, he will keep touch with me.
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