This condition is called seasonal affective disorder, or SAD for short.这种病情叫做季节性情感失调症，或简称SAD。I'm sad about my toys getting burned in the fire.我的玩具在这场火中付之一炬，这令我很难过。He died five or six years ago I'm sad to say.很遗...
Allergy to cats is one of the commonest causes of asthma.对猫类过敏是哮喘病发作最常见的诱因之一。Cystic fibrosis is the commonest fatal here-ditary disease.囊性纤维化是最常见的致命遗传疾病。This is one of the commonest traffic violations.这是常见的违反交通规则之例....
一般来说, PCV滤清器不需要定期维修.Often, the PCV filter does not receive regular maintenance.这时, 湿气会附在空气滤清器上, 而限制了它的流动.There, the moisture is either deposited on the air - filter element, restricting its flow.浮子室通气孔的效用是补偿空气滤清器阻塞的影响.Th...
A cyanide free silver electroplating process with 5, 5 - dimethyl hydantoin as coordination agent is studied.研究了5, 5- 二甲基乙内酰脲为配位剂的无氰镀银工艺.The process of cyanide free silver pulse electroplating is investigated in 5, 5 - d...