四循环 四循环
双语例句原声例句
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研究发现，城市树木的碳循环速度和生长速度几乎是乡村树木的四倍。
It was discovered that rates of carbon cycling and growth rates among city trees were nearly four times faster than those in the countryside.
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汽车发动机除了四冲程循环是否还有其他循环？
Are there any other cycles besides the Otto cycle used in car engines?
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循环拉伸跟腱，股四头肌，小腿肌，后背的肌肉和肩部的肌肉。
Cycle through hamstring, quadricep, calf, lower back and shoulder stretches.
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They start next Thursday in the cycle.
从下周四开始循环
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