We must balance the need for affordable energy today with the imperative of building a sustainable energy future.
几乎找不到一个能干的工人,他不会花大量时间研究自己可以工作得多慢,同时还能让雇主相信他工作得不错。
货币联盟不仅仅是经济问题,还涉及政治以及各国为更大稳定性而放弃部分主权的意愿。
The complexity of viruses reminds us how much we still have to learn about biology.