Twenty-thousand riot police will be backed by other officers and security personnel in and around a triple-tiered two-kilometer security ring.

韩国将为方圆两公里的安全区设立三层防线，部署两万名警察和大批保安人员。

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Coming complete with their matching Turbine rings, these cranks are available in both triple, double and two ring and guard combination options.

即将与他们匹配的涡轮戒指完成后，这些曲柄同时具备三重，双和两个戒指和后卫的组合方案。

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The molecule contains four carbon atoms arranged in a ring with a triple bond between two of them.

这个分子包含四个呈环状排列的碳原子，每两个碳原子之间形成一个三价键。

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Paul Levesque, executive vice president of talent and live events, better known in the ring as Triple H, says he can't think of a better way to celebrate WWE's annual WrestleMania event than using the group's global reach to assist those in need.

WSJ: WWE helps launch Superstars for Sandy Relief