旅游者

Based on extensive surveys, Manuel Orozco, a remittances specialist at the Washington-based Inter-American Dialogue institute, estimates based that the total amount sent home to the developing world last year was $298bn, much higher than the World Bank's estimate.

如今，在许多发展中国家，来自汇款的收入已经超过了外国援助、外商投资乃至传统出口。在中美洲，海外汇款收入很早之前就超过了咖啡、香蕉等传统的农业支柱产业。移民汇往摩洛哥的钱比旅游者在那里花的钱更多。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。