in the vicinity of £3 million/$1,500/2 billion years etc formal close to a particular amount or measurement 大约300万英镑/1,500美元/20亿年等 All meteorites are of the same age, somewhere in the vicinity of 4.5 billion years old. 所有陨石年代都差不多,大概都是45亿年左右。
→ in the vicinity of £3 million/$1,500/2 billion years etc at vicinity(2)