一级的

A gear H62 which made in yellow brass with the same mode number m=0.34, 2mm thick and had a center hole, when the gap get C=0.5%t , and punched with compound punching die, and the dimension accuracy reached IT7, the part have a flat surface ,the verticality of tangent plane reached 89.5°, its roughness Ra magnitude are 12.5μm, height of burr are 0.10mm; and the punching part are punched with progressive die, the gap C=7%t , initial accuracy are IT11, and have an more rough surface, even can see the gap with eyes.

例如料厚t=1.5mm的H62黄铜冲裁件，选用C≤40%t单边Ⅰ类小间隙冲裁比选用C≤8%tⅢ类大间隙冲裁，冲件固定误差将加大40%～60%，精度至少降一级。

The first order kinetic models based on subsection were setup to characterize the catalytic wet oxidation of succinic acid.

建立了丁二酸催化湿式氧化的一级分段动力学模型。

RESULTS:The degradations of N1-sorbyl-5-Fu were shown to display pseudo-first-order kinetics in buffer solutions and biological media.

结果： N1-山梨酰-5-氟脲嘧啶在缓冲溶液和组织匀浆中的降解服从表观一级反应，分配系数logP=1.5780。

The preparation of soda--lime silica glass for reference material is described.

本文简要介绍了钠钙硅玻璃国家一级标准物质的研制。

The three classifications of first-degree burn, second-degree burn and third-degree burn will help you determine emergency care

关于烫伤的三种分级，即一级烫伤，二级烫伤和三级烫伤能帮助你决定采用哪种紧急处理方式。

The child is on the bottom rung pf the ladder. We want to be on the top rung.

小孩子是在楼梯最矮的一级，而我们想要攀上巅峰。

Moreover, without land can not enter the primary market transactions in real estate markets, and in the real estate market on a number of "minefields."

另外，没有经过一级市场的土地也不能进入房地产市场进行交易，因而在房地产市场中就出现了许多&雷区&。

While playing the Minesweeper game, I found on the expert level I was often making silly mistakes.

虽然玩扫雷游戏，我发现在专家一级我常常使愚蠢的错误。

The lowest level is made up of simple opportunists.

最低一级是由简单的投机分子。

The reaction of the degradation is a first degree , and a constant of reacting rate is 0.5378 mmols/ L.h. The control of step is inside difussion for the process. A series of experiments had been done to remove SO2 with the biochemical reaction system.

脱硫菌通过将硫酸根离子还原成还原态的硫化物然后再固定到蛋白质降解SO2气体，固定化微生物生化降解SO2反应活化能为39.5kJ/mol，降解反应速度为一级反应，反应速度常数为0.5378mmol/L.h，内扩散为过程控制步骤。

By the time of its fall, most of the prisoners were writers who had written against the corruptions of the government.

到它被攻陷的时候，里面多数的犯人是写了反对政府贪污文章的作家。

The most obvious variation to ovum morphological character was that the color was changed from light green to sepiaceous in embryonic development, and all the ovums were almost hatched after 96h.

在胚胎发育过程中卵的形态特征最明显的变化是颜色从淡绿到深褐色，卵在发育96h后卵基本全部孵化。