劣质的英文：
inferior
poor
ungraded
bastard

参考例句：

Bush fallow: Poor quality land covered with scrubby vegetation.
灌木林修耕地，灌木林闲地:灌木丛生的劣质土地。

Cheap furniture,jewellery,shoes
劣质家具、珠宝、鞋

Prohibit inferior projects
坚决杜绝劣质工程

Allan sold tea of a kind last Sunday.
上星期日艾伦卖劣质茶叶

We have to lodge a claim against you for inferior quality.
我们不得不对你们的劣质产品提出索赔。

China has presently several dozen million head of low quality beef and dairy.
中国现有劣质菜牛和奶牛1千多万头。

That salesman really took us for a ride, these goods are very shoddy.
那个推销员真的欺骗了我们，这些都是劣质商品。

Wood packing is frequently made of non-manufactured, low quality, inexpensive raw wood
木质包装通常由没有加工的、劣质的、廉价的原木制成，

The salesman tried to fob off an inferior brand on us
那个推销员试图以劣质牌号骗卖给我们。

Even poor lenses and uncritical eyes can always seen something on the moon.
纵然用劣质透镜和没有鉴别力的眼睛也总能在月球上看到一些东西。

inferior是什么意思：
adj. 低等的；下级的；次的；较差的；下方的
n. 低于他人者；部下，属下；次品

an inferiority complex
自卑情结.

an inferior strain; an inferior kind; a rogue
劣种

He has a inferiority complex.
他有自卑情结。

poor是什么意思：
adj. 贫穷的；贫乏的；卑鄙的；可怜的；乏味的；缺少的；谦卑的
n. 穷人

They are poor but proud.
他们虽穷但很自重。

She is poor but quite respectable.
她虽穷，人品却很端正。

The poorness of the play disappointed the audience.
这出剧的拙劣令观众失望了。

ungraded是什么意思：
未整平的,劣质,次级,次级的,不分级的,不合格的