1.
Microstructure and Properties of 800 MPa Cold Rolled TRIP Steel
800MPa级冷轧相变诱发塑性钢的组织与性能
2.
Cyclic Softening/Hardening Characteristic of a High-Strength Low-alloy 800MPa Grade Steel
800MPa级低合金高强度钢的循环软硬化特性
3.
Study on the Welding Material and the Microstructure and Properties of the Welded Joint in a 800MPa Grade Structural Steel;
新一代800MPa级超低碳微合金钢焊材及接头组织性能研究
4.
800MPa grade heavy plates with low susceptibility to welding crack produced by direct quenching
直接淬火研制800MPa级低焊接裂纹敏感性高强钢厚板
5.
Controlling on Microstructure and Performances of Welding Joints of 800MPa Ultra-Fine Grained Steel
800MPa超细晶粒钢焊接接头组织和性能控制
6.
Effects of Processing Parameters on Microstructure and Properties of 800 MPa Hot Dip Galvanized Dual Phase Steel
工艺参数对800MPa热镀锌双相钢组织性能的影响
7.
Class, class, class;
班级，班级，班级；
8.
Skip from the fourth to the sixth grade.
从四年级跳级到六年级。
9.
Starter , Standard, Professiona
入门级, 标准级, 专业级
10.
(3) the lower level is subordinate to the higher level;
（三）下级服从上级；
11.
Demote from
降级，降职，使……降级。
12.
Triple A [3A ] 3A
级，最佳债券评级［
13.
director of bureau [directorate rank]
局长〔首长级职级〕
14.
Schools in the army are divided into those at higher, middle and lower levels.
学校有各级的：高级，中级，初级。
15.
They should also have middle-and lower-level schools.
还有中级的、初级的。
16.
The boy was kept back in the fourth grade.
男孩在四年级时留级。
17.
He had to repeat the fourth grade.
他读四年级时留级一年。
18.
extraction fractionation
提取分级（分离），萃取分级