these 四级六级

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

湍急河流持续侵蚀着这峭壁基部。

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

这是全包价格—房费、早餐费、服务费及税。

These TV sets do not assort with the samples.

这电视机与样品不符。

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

这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.

这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.

这行为与他原则是一致。

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.

这国家互不相容, 无法联合。

They attempted in vain to modernise these antiquated industries.

他们企图使这陈旧工业现代化,结果劳而无功。

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

这树能挡住旱风, 保护农田。

These machines would relieve the peasants of their backbreaking labour.

这机器可以把农民从繁重体力劳动中解放出来。

They were not able to prove these suspicions.

这怀疑他们无法证实。

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

这桌椅可以随儿童而调整。

The company is awake to these new developments.

该公司意识到这新发展。

These styles can be adapted to suit individual tastes.

这式样可以加以更改, 以适合个人喜好。

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

除了这安排以外，还增派救护车值班到午夜。

It is necessary to set down these additional rules.

有必要制定这补充规则。

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

这品质使得鲍西娅性格更加光彩照人,也使得一个尚女性形象更加完美。

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

显然，按规矩在这种场合你应该戴帽子。