He must study hard and store up knowledge so as to sere his (the) country in the future.
He must study hard and store up knowledge so as to sere his (the) country in the future.
他必须用功读书并积储知识以便将来服务国家。
He must study hard and store up knowledge so as to sere his (the) country in the future.
他必须用功读书并积储知识以便将来服务国家。