热心网友
还是看看这两词的英文释义吧，也许有助于我们分辨，再作“等级”讲时，两个词的英文释义分别如下：class:(a)set of people, animals or things grouped together,esp according to quality(b)one orf several different levels of comfort, etc available to travellers in a train, plane, bus etc(c)one of several grades of achievement in a university degree examinationgrade:(a)step,stage or degree of rank, quality,etc; level of classification(b)mark given in an ecamination or for school work(c)level of (esp musical) skill at which a pupil is tested。综上，如果产品的等级是从质量角度讲的，用两个词都是可以的。 。
热心网友
当然是用grade,我问过我外教了class 表示社会中的等级，如表示工人阶级：the class of workers
热心网友
grade
热心网友
class如:first class 头等
热心网友
class--侧重形态等方面grade--侧重品质的等级
热心网友
class for sure.
热心网友
Class.grade是年级、等级。
热心网友
Class