查询词典 Jefferson

Under President Jefferson, the country expanded westward with the purchase of the Louisiana territory and the Lewis and Clark expedition.

杰佛逊总统在位时主导美国向西扩张，不但购买了路易斯安那地区的土地，同时还派遣路易士和克拉克率队探索西部地区。

Once in office, Jefferson extended slavery with the Louisiana Purchase in 1803; the new land was carved into 13 states, including three slave states.

入主白宫以后，杰弗逊在1803年通过购买路易斯安娜扩大了奴隶制；这片新的土地后来被分为13个州，其中包括了三个实行奴隶制的州。

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。