Chn=Eng 核心,hé xīn,he xin=core,“heart”,nucleus 代替,dài tì,dai ti=substitute,instead 讲台,jiǎng tái,jiang tai=speaking platform,podium 乱哄哄,luàn hōng hōng,luan hong hong=disorderly and noisy,in an uproar 耳旁风,ěr páng fēng,er pang feng=in one ear and out the other 狡辩,jiǎo biàn,jiao bian=quibble,argue 反驳,fǎn bō,fan bo=retort,sharp reply 斥责,chì zé,chi ze=denounce 嚣张,xiāo zhāng,xiao zhang=to be arrogant,to be on one's high horse 争辩,zhēng bián,zheng bian=dispute 班级,bān jí,ban ji=classes or grades in school 权力,quán lì,quan li=power,authority 地位,dì wèi,di wei=position,status,place 成绩,chéng jì,cheng ji=achievement,performance records,grades 干活,gàn huó,gan huo=to work,to be employed,manual labor 刚好,gāng hǎo,gang hao=just,exactly,to happen to be 管,guǎn,guan=to take care (of),to control,to manage,to be in charge of,to look after,to run,to care about,tube,pipe,woodwind,(coll.) to,towards 纪律,jì lǜ,ji lu=discipline 注意,zhù yì,zhu yi=to take note of,to pay attention to 位置,wèi zhi,wei zhi=position,place,seat 顿时,dùn shí,dun shi=immediately,suddenly 静,jìng,jing=still,calm,quiet,not moving 埋头,mái tóu,mai tou=to immerse oneself in,engrossed in sth,to lower the head (e.g. to avoid rain),countersunk of screws 怒,nù,nu=anger,fury,flourishing,vigorous 登,dēng,deng=to scale (a height),to ascend,to mount,to publish or record,to enter (e.g. in a register),to press down with the foot,to step or tread on,to put on (shoes or trousers) (dialect),to be gathered and taken to the threshing ground (old) 黑板,hēi bǎn,hei ban=blackboard 极力,jí lì,ji li=to make a supreme effort,at all costs 不许,bù xǔ,bu xu=not to allow,must not,can't 吵闹,chǎo nào,chao nao=noisy 不然,bù rán,bu ran=not so,no,or else,otherwise,if not 闭上,bì shang,bi shang=to close,to shut up 神气,shén qì,shen qi=expression,manner,vigorous,impressive,lofty,pretentious 眼眶,yǎn kuàng,yan kuang=eye socket,rim of the eye 打转,dǎ zhuàn,da zhuan=to spin,to rotate,to revolve 忍,rěn,ren=to bear,to endure,to tolerate,to restrain oneself 烦,fán,fan=to feel vexed,to bother,to trouble,superfluous and confusing,edgy