low-grade

a. 低级的,列等的,轻度的

loveless, loveliness, lovelorn, lovely, lover, lovesick, loving, loving-cup, loving-kindness, lovingly, low, Low Church, low frequency, low season, low tide (also low water), low-born, Low-Churchman, low-class, low-down, low-fat, low-key (also low-keyed), low-level language, low-lying, low-paid, low-pitched, low-rise, lowbrow, lower, lower case, Lower Chamber (also Lower House), lower lip, lowermost, lowest, lowland, lowlander, lowliness, lowly, lowness, loyal, loyalist,