These are chains or rings of carbons atoms surrounded by hydrogen atoms.

这些链状或环状的碳原子被氢原子包围。

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BERLIN's network is made up of loops or rings, whereas that of PARIS has a radial structure.

柏林电网为环网结构，而巴黎电网为辐射型网络。

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On that day, lovers always exchange their gifts with each other, such as chocolates, roses or rings.

在这一天，情侣们总是彼此互相交换礼物，如巧克力，玫瑰花或戒指。

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They measured the rings,or circles, inside thousands of ancient trees in more than three hundred places.

VOA: special.2010.05.25

Buckley isn't an archaeologist. He studies tree rings, which record the growth history of trees that can be hundreds of years old, or even older.

VOA: standard.2010.04.05

The front side of the Vega R3 applies the dia-cutting technique, which is used in designing high-priced accessories like watches or rings to feature an overall strong and luxury image.

ENGADGET: Pantech Vega R3 packs Snapdragon S4 Pro, 5.3-inch screen into one hand

Police in Singapore are reporting what appears to be a ring (or rings) of online scam artists who use attractive women to "friend" victims on social sites, seduce them into cybersex on webcams and then threaten to post images or videos of them online if they don't pay up.

CNN: Police: Naked scammers seduce, blackmail men on Web

Children may also feel better if they gnaw on chilled, but not frozen, teething rings or safe toys made of rubber, unpainted wood or cotton terrycloth.

CNN: How can I soothe a teething baby's gums?