But because of this very low level tritium getting into the ground water and migrating it shut the laboratory down.
但是由于这个非常低标准的氚，进入到地下水里，迁移了水，关闭了实验室。
Leaf transpiration rate, above ground dry weight and water use efficiency were all decreased under the conditions of low water level.
水分低水位管理蒸腾速率、上部干物重和叶片水分利用效率下降。
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