因此，海流观测时首先使用雷达高度计探测海面坡度，再推算出地转流速。的翻译：Therefore, the current observation are the first to use radar altimeter detecting sea surface slope, and then extrapolating Geostrophic velocity. 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

Therefore, current observation to detect the first use of radar altimeter sea surface slope, to turn again to calculate the flow rate.

Therefore, the current observation are the first to use radar altimeter detecting sea surface slope, and then extrapolating Geostrophic velocity.

Therefore, when ocean current observation first uses the radar altimeter survey sea level slope, again calculated transfers the speed of flow.

Therefore, the currents observation, first use the radar altimeter detection off, then project the gradient to go flow rate.

Therefore, the current observation are the first to use radar altimeter detecting sea surface slope, and then extrapolating Geostrophic velocity.