While hunter-gatherers always had the option of moving elsewhere when the resources were exhausted, this became more difficult with farming.
当资源枯竭时，狩猎采集者总是可以选择迁移到其他地方，但这对于农业来说则更加困难。
The award was made through a modification to the Hunter CLS 2008 contract and will be performed over a period of two years with a third year option.
该授予根据对猎人无人机合同商后勤供应2008合同的修正授予，期限两年并有3年的可选执行期。
Then there is the Manhunt package, which gives high-end thrill-seekers the option to play the role of either the hunted or the hunter, and which can go on for either one or two days.
接下来还有「搜索人头」的行程，高阶的爱好刺激人士可以选择要当被搜索，或是搜索的人。
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