同工酶的谱带可归为四类，谱带的变化与干旱胁迫程度有一定相关，但规律不明显。
There were some correlations between the changes of the bands and the extent of drought stress, but their orderliness was not remarkable.
分析同步带常见故障成因，从安装和使用等方面制定相应的预防措施，减少故障发生。
The paper analyzes the cause of the broken-down timing-belt, and finds the ways from the fields of installation and operation etc. to prevent and reduce the faults.
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