他听到远处有一群小驯鹿尖叫的声音.Afar off he heard the squawking of caribou calves.驯鹿时代人的生活是一种边区生活.The life of the Reindeer men was a frontier life.那群驯鹿被一只狼群寻踪追赶上来.The herd of reindeer was being trailed by a pack of wolves....
The victorious army demanded unconditional surrender.胜方要求敌人无条件投降。Meanwhile, the differences between the conditional extremum and unconditional extremum in concept and evaluation are pointed.同时还指出了条件极值和无条件极值在概念上及求法上的一些区别....
Overall, barter is a very inefficient means of organizing transactions.总之，易货贸易是一种效率很低的交易形式。The market-place and street were crowded with those who'd come to barter.市场和街道上挤满了前来做物物交换的人。Chickens, goats and rabbits were...