Keyssar also scrutinizes unemployment patterns according to skill level, ethnicity, race, age, class, and gender.
凯萨还根据技能水平、种族、年龄、阶级和性别详细分析了失业模式。
2
Attempts were made to calculate Earth's age from the thickness of surviving sedimentary rock and from the current level of the oceans' salinity.
人们曾试图根据现存沉积岩的厚度和目前海洋的盐度水平来计算地球的年龄。
3
Consequently, children of a particular age cannot be expected to master educational material without taking into account their current level of cognitive development.