or 四级六级

Fog hid (or concealed ) the mountain.

雾遮住了（或 concealed ) 山峦。

If urethral obstruction occurs, congenital megaurethra is lethal without patent urachus or rectoesical fistula.

存在尿道梗阻，先天性巨尿道即便没有脐尿管未闭或直肠膀胱瘘也是致死性的。

Fifty states compose (or constitute or make up ) the Union.

50个州组成（或用 constitute 或 make up ) 联邦 。

Basic law or tradition was considered inviolable.

基本法律或传统被认为神圣不可侵犯。

I have not been interdicted from consuming or holding alcoholic beverages.

我没有被禁止饮用或贮藏酒精饮。

European evergreen plant with white or purplish roselike winter-blooming flowers.

欧洲的一种常绿植物，具有白色或微紫色花朵，冬天开花。

Never copy foreign things blindly or mechanically.

绝不能盲目或机械地照搬外国的东西。

Some communicable diseases are transmitted only through the agency of vermin or insects.

某些传染病只通过害虫昆虫来传播。

They went in consort two or three together.

他们三三两两结伴前往。

Whether Consols were going up or not, London had become a terrific property.

不管公债要涨价与否，伦敦总之已变成一块硕大无朋的产业了！

Typically the rock is massive, but commonly it is flaggy or schistose.

这类岩石典型地呈块状，但常呈薄板状或片理化。

Children under 12 and passengers aged 65 or above enjoy concessionary fares on all routes.

12岁以下小童65岁长者享有票价优惠。

Congress is not about to change its position on ownership or cabotage.

美国国会无意马上改变其在所有权美国国内航空运输的限制。

Whether or not we arrive on time is contingent on the weather.

我们是否按时到达要视天气情况而定。

Concentrators in geological sciences elect either geology or geography.

主修地质学的学生要选修地质学或地理课程。

Talk about hangovers! But aching head or not we were getting ready.

宿醉难受死了！但不管头痛与否我们都准备好了。

Do you do aerobics or play tennis, or anything like that?

你是有氧健身操还是打网球,或是其他类似的活动?

Doctors can treat acne with pills or creams.

医生可用药丸或药膏治疗粉刺。

Remove rust, millscale and other loose material by abrasive blasting or power tool cleaning.

用喷砂或其他电动工具除去铁锈、氧化皮等。

The preferred terms of milpa or swidden agriculture are taken from local names for field.

这种更喜好的血雨腥风的农业模式是从当地的田地名得来的。