427.from the historicalprospective

428.achieve spectacularbusiness success

429.have every reason to lend support in

430.suffer under the colonialrule 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 allowancefor 体谅

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.corporalpunishment

440.numerous studies have been done on

441.The mission of educating the young to be useful to society and to avoid wrong doing 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. 便后要冲水

448.dyed yellow hair

449.It is not absolute that an intelligent couple will have a clever child.

450.a more environmentallyfriendly place to live

451.the dangerous gas given off by exhausts of cars , bus and lorries

452.plain looking face 平凡的长相