红三叶群落地上部的净生产量、自然归还量和元素的存留量均显著高于地下部。
The net production, natural returning and retaining amount of elements in aboveground portion were a markedly higher than that of underground in t.
然而，凭以往的经验我可以很确定的说，我们大多都有过忘记归还的时候，这自然会导致人们之间关系紧张。
However, and I am certainly speaking from experience here, most of us have probably forgotten to return stuff on occasions and this of course can lead to all kinds of tension.
我们这个身体是来自大自然的，终有一天会归还给他。
Nature endows us with our bodies; however, it will take our bodies back at last.
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