查询词典 beforehand

We need to make accurate estimate beforehand.

我们需要事先作出准确的估计。

If you know you will be late, it is polite to notify the teacher beforehand.

如果你知道你将会迟到，事先通知老师是一个有礼貌的做法。

We need to make accurate estimation beforehand.

我们需要事先作出准确的估计。

We need to make an accurate estimate beforehand.

我们需要事先作出准确的估计。

If you are going swimming, do not eat beforehand.

如果你要去游泳，事前不要吃东西。

You need to research your business beforehand .

你需要事先去为你的工作做个研究。

We need to make a accurate estimate beforehand.

我们需要事先作出准确的估计。

In case of being away,I will let you know beforehand.

如果外出，我会事先告诉你的。

Also I wanted to know beforehand what he wanted to talk about.

我也想预先知道他想谈什么。

We have to make an exact estimate beforehand.

我们需要事先作出准确的估计。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。