artificial 人工的，人造的，人为的 artificial price controls
ascend 登高，（渐渐）上升，升高 The airplane ascended into the cloud.
ascertain 查明，弄清，确定 I ascertained that he was dead.
ashamed 惭愧的，羞耻的 I am ashamed for being so stupid.
ashore 向岸，向陆地 He swam ashore.
aside 在旁边 We stood aside to let her pass.
assault 攻击，袭击 We made an assault on the enemy fort.
assemble 集合，召集 assemble the members of Parliament for a special meeting.
assert 肯定地说（出），坚定地断言 He asserted his innocence.
assess 估价，评价，评论 assess the present state of the economy
assign 分配，布置（作业） The teacher assigned (us) a new lesson.
assimilate 吸收，消化 He is quick to assimilate new ideas.
associate （使）联系，（使）结合 We naturally associated the name of Darwin with the doctrine ofevolution.
assume 假定，假设 Farmers will have a bumper harvest, assuming (that) the weather sifavarable.
assure 深信不疑地对......说，向......保证
assurance 保证，把握，信心 He gave me his assurance that he would help.
astonish 使惊讶 I was astonished at his sudden appearance.
attach 系，贴，连接 attach a label to a suitcase
attain 达到，获得 attain one’s goal
attend 出席，参加（会议等） attend a wedding
attendance 出席，参加，出席人数，出席率 Our class has perfect attendance today.
attentive 注意的，专心的 an attentive audience
attribute 把归因于，把......（过错的责任等）归于(to) He attributed his success to hard work.
auxiliary 辅助的 an auxiliary rocket
avail 有利于，有助于 Will force alone avail us?
average 平均数，平均 The paper receives an average of nearly 100 articles a day.
avert 挡开，防止，避免 Many traffic accidents can be averted by courtesy.
awake 醒，觉醒 awake from sleep
bang （突发的） sudden loud bang
bare 赤裸的，光秃的，空无内容的 walk in bare feet
beforehand 预先，事先 If you wanted soup for lunch you should have told me beforehand.
behave 举止端正，听话 Do behave.
bewilder 使迷惑，使糊涂 I’m bewildered as to which one to buy.
bias 偏见，偏心 have a bias against sb.(或sth.)
blame 责备，责怪 Public opinion blames Mrs Smith for leading the girl astray.
blast 一阵（风），一股（气流） a blast of wind
blaze 火焰 The fire sprang into a blaze.
blunt 钝的 The sun was blazing down and the heat was oppressive.
blush （因害羞、激动、窘困）脸红 blush with(或for) joy
boast 自吹自擂，自夸的话 He is full of boasts.
bolt 螺栓，（门，窗的）插销 a small bag of nuts and bolts
boom 低沉有回响的声音 The great bell tolled with a deep boom.
border 边界，边境，边沿 a district on the Kampuchean side of the border with Thailand
bore 钻孔，挖（通道） bore through a wall
bound 跳跃，弹回 She bounded to her feet and waved her right hand triumphantly.
boycott （联合起来）抑制，拒绝参加 boycott uncooperative manufactures
brace 托架，支架 He braced his muscles and lifted the weight.
breed （使）繁殖 Rabbits breed families rapidly.
bribe 贿赂 accept(或take)a bribe from sb.
brief 短暂的，简短的，简洁的 a brief holiday
brisk 轻快的，生气勃勃的 a brisk pace
brittle 易碎的，一碰就破的 brittle glass
brush 刷子，毛刷 a laundry brush
bump 碰，撞(against, into) The truck bumped against the wall in the dark.
burst 爆炸，爆裂 The boiler burst.
calculate 计算，推算 calculate the distance between New York and Chicago
capture 俘虏，捕获 capture butterflies
case 事例，事实，事情 This is a case of poor judgment.
cast 投，扔，抛，撒，掷 cast doubt(s) on the feasibility of a scheme
casual 偶然的，无计划的，随便的，非正式的 a casual meeting
cease 停止，终止，结束 The music ceased suddenly.
character （事物的）性质，特质 The furniture in Tom’s apartment was pretentious and without character.
charge 要（价），收（费） The airlines charge half price for students.
charm 魅力，魔力 This thriving resort town has retained its village charm.
chase 追逐，追求 The police chased the escaping thief and caught him at last.
check 使突然停止，制止 check one’s steps
cherish 珍爱，珍视 cherish one’s native land
chew 嚼，咀嚼 He chewed a mouthful of meat.