外语学习是一项耗时耗力的长期任务。
Foreign language learning is a long endeavor that needs time and efforts.
还有一项手机业务让农村商店可用手机订货,省去了耗时耗力的城市市场之旅。
Another allows rural stores to order goods, saving time-consuming trips to city markets.
普京承认这将是一项耗时耗力的任务,但他警告说“如其不然,主要国家将卷入严重冲突之中。”
While he conceded this could be a lengthy and gruelling task, Mr Putin warned the alternative could be serious conflicts involving major countries.
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