Little tiger and little grizzly began to make trouble, they scribble on the blackboard, while the teacher does not pay attention to the time, littering chalk head.
小老虎和小灰熊又开始捣乱了，他们在黑板上乱涂乱画，还趁老师讲课不注意的时候，乱扔粉笔头。
The head yield, chalk size and chalk rice rate were greatly affected by low temperature.
整精米率和垩白大小、垩白米率受低温的影响较大。
Under suitable density condition, protein content increased and amylose content, head rice rate and chalk grain decreased.
在适宜密度条件下蛋白质含量较高，垩白率和直链淀粉含量较低。
Under suitable density condition, protein content increased and amylose content, head rice rate and chalk grain decreased.
在适宜密度条件下蛋白质含量较高，垩白率和直链淀粉含量较低。
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