... 多年生作物灌溉 perennial crop irrigation 一年生冬季作物 winter annual 连续多年生作物实验室 sustainable perennial crops ...
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winter annual plant 冬性一年生植物
winter-annual cover crops 一年生越冬覆盖作物
winter annual weed 冬性一年生杂草 ; 越年生杂草
classification for winter annual 冬性一年生植物分类
winter annual weeds 越年生杂草
winter annual grass 冬性一年生禾草
winter annual strain 冬性一年生品系
winter annual cereals 冬性一年生禾谷类
annual winter mean temperature 年冬季平均温度
We are close to a knowledge of annual summer and winter temperature variations over much of the northern hemisphere going back 600 years.
我们很快就会知道，600年前北半球大部分地区每年夏季和冬季的温度是如何变化的。
The Moon's brightness varies throughout its annual cycle, during the mid-winter in the northern hemisphere it can appear brighter simply because it is higher in the sky.
月球的亮度随着轨道位置的变化而变化，在北半球的深冬，月亮会更亮，因为它在天空中更高。
The annual survey by the British Beekeepers' Association revealed 19.2 per cent of colonies died in the winter.
英国养蜂者协会的年度调查显示有19.2%的蜜蜂群在冬季死去。
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