等级标志的英文：
grade mark
n. 年级；阶段；等级
v. 将…按级别分类；给…批分数，改作业；混合
- longitudinal grade
纵坡度 - There are lots of jobs in junior grades.
初级阶段有很多工作要做。 - Red grades into pink.
红色逐渐变成粉红色。 - The teachers are grading the papers.
老师们正在给卷子打分数。 - Pencils are graded according to softness.
铅笔根据硬度分类。
n. 符号；记号；分数，成绩；污点；迹象
v. 做记号；做标记；表明方位；标志；庆祝
- Marking: Every package shall be marked with “SM” in diamond and marked the package number.
麦头每件包装应刷上菱形图案内有二字,并应刷上件号 - impress a mark on [ upon ] a surface=impress a surface with a mark
在表面上打记号 - To mark or mottle with spots.
有斑点，成斑驳用点作标记或使斑驳杂色 - mark one's cross
画押，画十字 - Rogers was first off the mark.
罗杰斯第一个偏离原定方针。
