Prooblems usually crop up and hit you before you are ready.

All the chief difficulties crop up in the synthesis of the enone ( 1 ).

所有的主要难点都涌现在烯酮 ( 1 ) 的合成中.

It's silly to paper over the problem; it will only crop up again one day.

把这个问题掩盖起来的作法是愚蠢的, 总有一天还会暴露的.

Keep calm when problems crop up.

遇事冷静.

Misprints often crop up in the papers.

报上常出现印刷错误.

Problems will crop up and hit you before you are ready.

你还未准备好，问题就会突然出现并打击你。

This change starts with the 2009 crop year.

该调整将从2009作物年度开始实施.

Implementation of the appropriate yield-protection factors insures that the maximum crop yield is harvested.

恰当的产量保护措施能保证我们收获最高产量.

Our result could potentially be used to increase crop yield and efficiency of land usage.

我们的研究将为提高作物产量,增加土地利用率提供理论依据.

The relation between crop water use efficiency and crop productivity potential, crop yield were investigated.

研究了作物水分利用效率与作物生产潜力 、 产量的关系.

It also demonstrated that proper intercropping years and tree spacing between-rows would effectively increase crop yield.

在一定范围内,行距越大,产量达到最高的年限就越推后.

In this paper , the authors develop an operational method to predict crop yield in China.

提出了适于运行化农作物单产预测的方法.

Crop yield is strongly affected by the canopy temperature after flowering, especially at mid-late grain-filling stage.

作物花后特别是灌浆 中后期 的冠层温度对产量具有较大影响.

Effects of rice straw mulch and water-retaining agent on soil properties and crop yield.

与保水剂和稻草覆盖对作物和土壤的效应>>相似的文献.

What is your current crop yield?

你们这次庄稼收成 怎样 ?

Fertilization rate can be reduced from 15 % to 20 % at equal crop yield.

等产量情况下,可减少肥料投入量15%～20%.

An operational method of crop yield disaster losses evaluation is introduced.

介绍了农作物产量灾害损失评估业务化方法.

Crop yield correlates closely with annual rainfall.

农作物的收成与年降雨量有密切关系.

Be true cropland after all 7?

到底是不是真的田七?

Seventy percent of all cropland depends on rain.

70%的庄稼都依靠雨水.

This is only a part of his cropland.

这仅仅是他的农田的一部分.