当种子落在合适的土壤表面时，一株新的植物就会在那里生长，但由于它们体型不大，它们无法与其他植物竞争空间、水分或阳光。
A new plant will spring up wherever a seed falls on a suitable soil surface, but because they do not build big bodies, they cannot compete with other plants for space, water, or sunlight.
看来，为了让种子吸收水分，种子的外壳必须裂开或破裂。
It appears that the shell has to crack open or break down somewhat to allow the seed to soak up water.
其他种类的玉米水分少，不易爆开。当你加热一粒玉米种子时，里面的水会使玉米爆炸。
Other kinds of corn have less water and do not pop. When you heat a seed of corn, the water inside makes the corn explode.
不是所有的玉米都能爆开，只有当一粒玉米种子里含有14%的水分时才能爆开，少于14%水分的玉米不能爆开。
All corn does not pop. A seed of corn must have 14% water in it to pop. Other kinds of corn have less water and do not pop.
但在土壤表面之下有着足够水分供玉米种子开始生长。
But below the surface, it has enough water to let corn seeds begin to grow.
死的植物种子可以在水分与阳光的帮助下再次发芽。
They can appear dead until one puts them in water and sunlight.
玉米种子在萌发出苗阶段，水分胁迫诱导了POD和CAT活性的升高。
Water stress induced the activities of POD and CAT increasing in seedling emergence stage of maize.
玉米种子在萌发出苗阶段，水分胁迫诱导了POD和CAT活性的升高。
Water stress induced the activities of POD and CAT increasing in seedling emergence stage of maize.
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