1.为动词,通常指“间断的、持续性的,有时是一抽一抽的疼痛”。例如:His muscles ached from chopping wood.他的肌肉因劈柴而隐约作痛。2.有时用作比喻义,意思是“悲痛,苦恼, 同情”。例如:His mother ached at the very thought of what might happen.一想起...[继续阅读]

    1.为名词,ache指一种持久的疼痛,是小病或失调引起的感觉,常是局部的。2.pain指人体感觉到不舒服,或由于严重受伤或疾病引起的疼痛,有时也指局部疼痛影响全身,比ache重。例如:His face was drawn with pain.他疼得面部肌肉都抽缩起来了。...[继续阅读]

    1.可用作及物动词,也可用作不及物动词,指达到所期望的目标或一定水平的成就。例如:He achieved because he was a hard worker.他辛勤工作,因而取得了成就。2.achieve,gain,attain,reach都作“达到, 获得”解,但含义不尽相同:a.) achieve着重表示达到一...[继续阅读]

    1.均为形容词,acid用于那些在自然或正常状态下有酸味的东西。例如:A lemon is an acid fruit.柠檬是一种酸水果。2. sour常与acid互换使用,但sour通常包含有变质难闻的意味。例如:sour milk发酸变质的牛奶但也可能不暗示这种变质。例如:sour...[继续阅读]

    1.为动词,作“承认”解,其后可接as、动名词、that从句或复合宾语。例如:He acknowledged his defeat at the elections.他承认自己竞选失败。Jim is acknowledged as an expert on the subject.大家公认吉姆是研究这个问题的专家。He grudgingly acknowledged having...[继续阅读]

    1.acknowledge着重“公开承认”过去隐瞒或曾经否认过的事。例如:With so much evidence against him,he could not but acknowledge his error.在如此多的证据面前他不得不承认自己的过错。2.adimit常暗示外界压力下的“承认,不情愿”的意味比acknowledge重。...[继续阅读]

    1.作及物动词用于主动语态时,宾语后接 with短语,有以下用法:a.)作“使认识,使了解”解,多以oneself 为宾语。例如:I have acquainted myself with the subject.我已经了解了这个科目。b.)作“通知,告诉”解。例如:I acquainted him with the event/my intent...[继续阅读]

    1.该词除用作集合名词外,还可以用作可数名词。作“相识之人,熟人”解。例如: He has a wide circle of acquaintance(s). 他交际极广。a casual/chance acquaintance偶然结识之人a nodding/bowing acquaintance点头之交a speaking acquaintance见面才说几句话的相识...[继续阅读]

    1.不能把介词across用作动词cross。不能说:* You must be careful while acrossing the street.应该说:You must be careful while crossing the street.过马路要小心。2.用作形容词,相当于crossed,意为“交叉”。例如:He is standing here with arms across.他正两只胳膊交叉...[继续阅读]

    1.作不及物动词,可与on,upon连用,作“起作用,尽职责”解。例如:Does the drug take long to act(on the nerve centres)?此药物需长时间才(对神经中枢)起作用吗?The gastric juice acts upon the food we swallow.胃液消化我们吃下去的食物。2.作及物动词,作“扮...[继续阅读]