Research on water quality appraisal and water environmental capacity of Zhelin Reservoir is necessary.

因此，本文展开对柘林水库水质评价和水环境容量的研究。

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As for regional distribution, samples collected from Zhelin Bay had wider toxin profiles and higher toxin concentration.

总体上，麻痹性贝毒在粤东海域的分布具有明显的地域性、季节性和贝类种间差异。

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Then there must be a large cudrania grove here, otherwise the waterfall wouldn't have been called Zhelin (Cudrania Grove) Waterfall.

那这周围肯定有大片大片的柘树林， 要不然这处瀑布怎么会叫柘林瀑呢。

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