Bad faith

bad [bæd]

adj. 坏的，不好的;严重的;不舒服的;低劣的，有害的; n. 坏人，坏事; adv. 不好地，非常地;

faith [feθ]

n. 信用，信任;宗教信仰;忠诚;宗教; int. 实在，确实;

fai(trust)+th(名词后缀)→信仰；信心

He did it as a special favor.

他做这事算是特别照顾。

To teeter-totter

玩跷跷板

when they would be capable of providing information about traffic jams and suggesting alternative routes, when they would be used in hospitals to help doctors to diagnose illnesses, when they would relieve office workers and accountants of dull, repetitiv

计算机可以使办公室人员和会计免除那些枯燥、重复的劳动。