The carbon cycle influences the rate at which mountains weather down into seas, the deep circulation of ocean waters helps govern the ebb and flow of ice sheets, and so on.
碳循环影响了山脉夷为海洋的速度，海水深度循环有助于控制冰川消逝和流动，诸如此类。
Known as the "ace of ACES" for shooting down dozens of German enemy planes, Rickenbacker took command of the squadron soon after morale hit its lowest ebb.
瑞肯波克在战斗中击落了许多的德军飞机，被认为是“王牌飞行员中的王牌”，他在飞行中队士气最低落的时候出任队长。
Fishing boats were standing down with the ebb.
渔船趁着落潮出航。
"We reviewed data from 40 sites," he says, including evidence from ancient coral reefs, eroded beaches and telltale sediments laid down in the ebb and flow of 125,000-year-old tides.
“我们从40个站点浏览资料，”他说，包括从古珊瑚礁，被侵蚀的沙滩和一十二万五千年古老的潮汐留下的象征性的沉积物中。
Days and nights come up and go down with unfailing regularity, like the ebb and low of an infinite ocean.
日月更替，亘古不变，就好比那无尽大海的潮涨潮落。
Days and nights come up and go down with unfailing regularity, like the ebb and low of an infinite ocean.
日月更替，亘古不变，就好比那无尽大海的潮涨潮落。
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