- of poor quality糟糕的, 差的; 拙劣的, 劣质的：
a bad diet
劣质饮食
a bad film.
拙劣的电影。
- not functioning to a required or expected standard不合格的：
bad eyesight.
不合格的视力。
- not able to do something specified well不擅长的：
I'm so bad at names
我极不擅长记人名
a bad listener.
不注意倾听他人说话的人。
- attrib. not appropriate to a particular purpose不恰当的; 不适宜的：
morning was a bad time to ask Andy about anything.
早上最好什么也别去问安迪。
- not such as to be hoped for or desired; unpleasant or unwelcome令人不快的; 恶劣的; 不幸的：
bad news
噩耗
bad weather
坏天气
bad luck.
厄运。
- (of something causing pain, danger, or other unwelcome consequences) severe or intense（疼痛、危险或其他不良后果）严重的; 厉害的：
bad headaches
剧烈的头痛
a bad crash
严重的撞击
a bad mistake.
严重的错误。
- unfavourable; adverse不利的; 不友好的, 敌对的：
bad reviews.
不友好的评论。
- predic.
bad for
having a harmful effect on有害的： soap was bad for his face.
肥皂对他的脸有害。
- lacking or failing to conform to moral virtue邪恶的; 道德败坏的：
the bad guys
坏家伙
bad behaviour.
不端的品行。
- (of a part of the body) injured, diseased, or causing pain（身体一部分）受伤的; 生病的; 疼痛的：
a bad back.
受伤的背。
- as complement(of a person) unwell（人）不适的：
I feel bad.
我觉得不舒服。
- (of food) decayed; putrid（食物）腐烂的：
everything in the fridge would go bad.
冰箱里样样东西都可能变质坏掉。
- (of the atmosphere) polluted; unhealthy（大气）污染的; 有害健康的：
bad air.
受污染的空气。
- as complement regretful, guilty, or ashamed about something遗憾的; 后悔的; 难过的：
working mothers who feel bad about leaving their child.
因离开孩子而感到难过的上班族母亲们。
- (of language) using words generally considered offensive（语言）无礼的。
- worthless; not valid无价值的; 伪造的：
he ran up 87 bad cheques.
他开了87张空头支票。
badder, baddest
informal, chiefly US good; excellent〈非正式, 主美〉好的, 特棒的：they want the baddest, best-looking Corvette there is.
他们想要当今最好最漂亮的小型快艇。
- N. Amer. informal badly〈北美, 非正式〉厉害地：
he beat her up real bad.
他狠揍了她一顿。
a bad penny always turns up
- 见PENNY.
a bad workman always blames his tools
- 见WORKMAN.
come to a bad end
- 见END.
from bad to worse
- into an even worse state每况愈下。
in a bad way
- ill or in trouble有病的; 处境不佳。
my bad
- N. Amer. informal used to acknowledge responsibility for a mistake〈北美, 非正式〉［用于表示承担犯错误的责任］我的错：
Sorry I lost your CD. It's my bad.
对不起, 我弄丢了你的CD。是我的错。
not（或not so）bad
- informal fairly good〈非正式〉还好的, 不错的：
she discovered he wasn't so bad after all.
她发现他毕竟还是不错的。
to the bad
- to ruin（走）向毁灭：
I hate to see you going to the bad.
我不愿看着你走向毁灭。
- in deficit负债：
he was £80 to the bad.
他欠了80英镑的债。
too bad
- informal used to indicate that something is regrettable but now beyond retrieval〈非正式〉可惜; 不幸; 实在遗憾：
too bad, but that's the way it is.
真不幸, 可就是那么回事儿。