The ability of coal to release a combustible gas has long been known.
煤能够释放易燃气体这一点早已为人所知。
The Qinghai-Xizang Plateau has long been known as the roof of the world.
青藏高原素有世界屋脊之称。
It has long been known as the best car in the world.
长期以来它被认为是世界上最好的汽车。
In contrast, marriage has long been known to mellow men out.
相反，婚姻使男人变成熟则已久为人知。
A lack of vitamin D has long been known to have an effect on bones.
维生素d的缺乏长期认为会影响骨骼。
It has long been known that there are 92 solutions to the problem.
很久以前人们就发现八皇后问题有92种解决方法。
"It has long been known"... I didn't look up the original reference.
“长久以来大家已经知道”…我根本没有去找寻原始资料。
Singapore has long been known as a global foreign exchange trading hub.
新加坡长久以来被视为国际外汇交易中心。
Reading has long been known as away to improve children's intelligence.
人们很早就晓得阅读有助于进步儿童的智商。
Yoga has long been known to lower blood pressure and slow the heart rate.
瑜伽素有降低血压和减慢心率。
China has long been known as the factory to the world, and with good reason.
中国长久以来已世界工厂而闻名，这是名副其实的。
It has long been known that there is a first relationship between heart and liver.
长期以来，大家知道心脏和肝脏的关系是最主要的。
Paris has long been known for stylish people, delicious cuisine and universal health care.
巴黎一直因时尚、美食和全民医保制度而闻名于世。
The central nervous system (CNS) has long been known to be a "immunological privileged site".
中枢神经系统(CNS)被认为是“免疫特免区”，是组织移植的理想部位。
Sleep Paralysis has been known for a long time.
睡眠麻痹早已不是什么新鲜事。
Now, this has been known for a long time.
这一事实早已被世人所知
The existence of oil Wells has been known for a long time.
油井的存在由来已久。
In our country has long been "dianthera" known.
在我国早有“山珍仙草”之称。
How long has nuclear power been known to scientists?
核动力为科学家所认识己经有多久了？
How long has nuclear power been known to scientists?
核动力为科学家所认识己经有多久了？
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