412.The maintenance of sth is futile.
413.Being traditional is quite different from being out of date.
414.Animals play a vital role in maintaining the subtle balance of the earth’s ecological system.
415.Therefore， to some extent， killing animals is equal to digging our own graves.
416.Pigs are used in the battle against drugs.
417.It’s noticed that citizens live longer if they keep pet after their retirement.
418.For our own future benefit， please do treat sb with love and care.
419.Sth has led to some unfavorable results.
420.joint activities between relatives
421.If the situation is left to continue as it is， many new problems for individuals and families， and even for society as a whole， will arise in the future.
422.University education can not only benefit us by equipping us with ancestors’ experience but also help us to avoid going off the right path.
423.social intercourse
424.intense academic atmosphere can guide us to reach a balance between academic and practical activities.
425.Sb have made great progress in supplying sb with more and more field trips and practical courses.
426.accululate experience helpful for our future enterprises
427.from the historical prospective
428.achieve spectacular business success
429.have every reason to lend support in
430.suffer under the colonial rule of western powers
431.the further development of rich countries is dependent upon
432.rebellious
433.be under an obligation to give sb a helping hand in improving sth
434.The situation is completely unacceptable.
435.make allowance for 體諒
436.is a necessary supplement to the knowledge they gain from school course
437.reinforce children’s sense of responsibility
438.help them understand the famous saying” no pain no pain” better
439.corporal punishment
440.numerous studies have been done on
441.The mission of educating the young to be useful to society and to avoid wrongdoing can be fulfilled in many ways.
442.should learn more about the inner world of youngsters， try to understand them， and guide them to acquire a sense of self-worth.
443.Whether sth is the best measure for handing any problem caused by children is up to the parents to decide—not the schools.
444.malnutrition
445.disturb the natural balance
446.a powerful corrective
447.Don’t forget to flush. 便后要沖水
448.dyed yellow hair
449.It is not absolute that an intelligent couple will have a clever child.
450.a more environmentally friendly place to live
451.the dangerous gas given off by exhausts of cars ， bus and lorries
452.plain looking face 平凡的長相