these 四级六级

The fast-moving river continues to erode the base of these red cliffs.

的河流持续侵蚀着红岩峭壁的基部。

These are allin prices—room, breakfast, service and tax.

是全包价格—房费、早餐费、服务费及税。

These TV sets do not assort with the samples.

电视机与样品不符。

These athletes work out at the gym for two hours every day.

运动员每天都要在体育馆锻炼两个小时。

These pioneers are very attentive to the grandny and do everything for her.

少先队员们很关心那位老大娘,什么事情都替她做。

These actions are consistent with his principles.

行为与他的原则是一致的。

These tyres are advertised as being everlasting.

广告上说轮持久耐用。

These on reduction with NaBH4 gave exclusively cis-3-heterocycle substituted chroman-4-ols in good yields.

【文摘】3,3-Dibromochroman-4-ones on reaction with different heterocyclic secondary amines gave 3-substituted chromones.

These nations are antipathetic(al) to each other and cannot unite.

国家互不相容, 无法联合。

They attempted in vain to modernise these antiquated industries.

他们企图使陈旧的工业现代化,结果劳而无功。

These trees will shield off arid winds and protect the fields.

树能挡住旱风, 保护农田。

These machines would relieve the peasants of their backbreaking labour.

机器可以把农民从繁重的体力劳动中解放出来。

They were not able to prove these suspicions.

怀疑他们无法证实。

These desks and seats can be adjusted to the height of any child.

桌椅可以随儿童的身高而调整。

The company is awake to these new developments.

该公司意识到的发展。

These styles can be adapted to suit individual tastes.

式样可以加以更改, 以适合个人的喜好。

In addition to these arrangements, extra ambulances will be on duty until midnight.

除了安排以外，还增派救护车值班到午夜。

It is necessary to set down these additional rules.

有必要制定补充规则。

These qualities adorn the character of Portia,and these go to accomplish a perfect woman.

品质使得鲍西娅的性格更加光彩照人,也使得一个高尚的女性形象更加完美。

Apparently, good form requires you to wear a hat on these occasions.

显然，按规矩在种场合你应该戴帽子。