The parasite population opposing vertical resistance may undergo stepwise development controlled by many genes.
生物种群可能要经历许多基因控制的步增发育。
Along with the popularization of computer and stepwise development of teaching software, multimedia teaching shows the tremendous advantages.
随着计算机的普及和教学软件的逐步开发，多媒体教学已显示出其巨大的优势。
Stepwise advice is provided through 11 learning modules, each representing a key step in the WSP development and implementation process.
水安全计划的开发与实施过程中的分步实施建议提供了11个学习模块，每个模块都是水安全计划中的一个关键步骤。
Stepwise advice is provided through 11 learning modules, each representing a key step in the WSP development and implementation process.
水安全计划的开发与实施过程中的分步实施建议提供了11个学习模块，每个模块都是水安全计划中的一个关键步骤。
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