在第一组试验田中，她正在比较传统的两年制小麦休耕轮作制和三年轮作制，即首先种植免耕冬小麦，第二季种植免耕冬小麦，然后种植高粱。
In one set of plots, she is comparing the traditional 2-year, wheat-fallow rotation with a 3-year cycle of no-till winter wheat, followed by a second crop of no-till winter wheat, followed by sorghum.
综合实践活动课程是在普通高中新课程第二轮试验开始时列入全日制普通高中课程计划的必修课程。
Comprehensive practice course is a required subject when the second-round experiment of ordinary high school new courses has been included in the full-rime ordinary high school course plans.
用无铬化学方法在铸铝合金表面制得黑色转化膜，利用点滴试验评价了膜的耐蚀性能。
Black conversion film with non-chromate was obtained on a cast aluminum alloy by chemical methods, and the anticorrosion properties of the film were evaluated by means of dropping test.
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