PH, the content of soil organic and nutritive elements and the soil texture are the impacting on the production of Chinese chestnut; iron, manganese, boron and other trace nutritive element are the important impacting on the character of Chinese chestnut.

The experiment has shown that heat treatment can change the pattern and distribution of manganese& boron alloyed white cast iron carbide and the effect has close relationship with the treatment technique heat parameter and the pattern of the cast carbide.

试验结果表明：热处理可改变锰硼白口铸铁碳化物的形态与分布，其效果与热处理工艺参数及碳化物形态等密切有关。

By adding silicon, manganese, boron and rare earth elements to the alloy, the properties of the alloy was optimized.

在国产ZZnAl4Y合金的基础上添加硅，锰，硼，钛和稀土元素，优化合金性能。

The agricultural area pollution and the wind-borne dust in the bare farmland should be harnessed.

农业面源污染、裸露农田扬尘基本得到控制。

Experimental Studies on the Intercropping of Chinese Toon and Crops in Wind-borne Sandy Areas of the Plain

平原风沙区香椿与农作物间作效益的试验研究

You needn't have worried& you played the part of hostess as if to the manner born.

你事先根本不担心&你似乎是天生的女主人。

He was a gentleman to the manner born.

他是一个天生的君子。

S eth: Your soul was not born yesterday, but before the annals of time as you think of time.

赛斯：你的心灵并不是在昨天诞生的，而是在你们所有的计量时间的开始之前。

Don't worry! I was not born yesterday.

别担心！我又不是三岁小孩儿。

High precision automatic microfeed universal boring head

高精度自动微进万能镗头

Design and Application of a Auto-feed Boring Head Using in Machining End Surface of Thin-wall Big Case

新型自动进给式镗头的设计与应用

The design combination boring head is for enhances the box body the processing precision and the efficiency.

其中设计专用夹具和组合镗头的应用进一步提高箱体的加工精度和效率。

Chip microprocessors control system of numerically controlled boring head

数控镗削头单片机控制系统

Experiment research on vibration model of precision boring head s

精密镗削头振动模态的实验研究

Series JDT precision boring head with fine adjustments and automatic monitoring compensation system

JDT系列精密微调镗头及自动检测补偿系统

The Application of Function Units for Building-block Machine-DSS Fine Boring Head

浅谈德国许勒公司组合机床功能部件&DSS精镗头

Research on brick masonry strength test method of core boring sampling

钻取芯样法检测砖砌体抗压强度的研究

Vertical bearing capacity test studying for boring prepakt concrete caisson pile

压浆混凝土钻孔灌注桩竖向承载力试验研究

I know revising for a test can be boring, but keep your chin up!

例句我知道考前复习可能很枯燥，但你得保持斗志！

Automatic compensating device for boring cutter wear

镗刀磨损自动补偿装置

Influence of the Offset Riding Boring Cutter upon the Dimensional Accuracy of Bored Hole

浮动镗刀偏心距对被加工孔尺寸精度的影响