在最近几年里，美国马拉松跑步者已经经历了由于饮水过量导致血钠浓度过低或低钠血症的致死事件。
In recent years, U. S. marathons have experienced participant deaths due to excessive intake of water, which can lead to an abnormally low level of sodium in the blood, or hyponatremia.
研究不同浓度PEG、不同处理时间渗透处理对超干杉木、马尾松和黑松种子活力的影响。
This paper dealt with the effects of PEG pretreatment, including different concentrations and treat time, on the vigor of ultradried seed, such as Cunninghamia lanceolata and Pinus massoniana.
增加供磷浓度能普遍提高各种源马尾松幼苗的生物产量，但不同磷浓度对幼苗产生的生理效应各不相同。
Increase of the phosphorus content can enhance the biomass of masson pine seedling, but the physiological effect of P contents on the seedling is various.
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