The incline jet axis and strengthened convergence happen earlier than the rainfall does.

高空急流轴倾斜以及急流出口区右侧强辐散场的出现要早于暴雨的发生。

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A mathematical model for the trajectory of the jet axis was proposed on the principle of momentum conservation.

以动量守恒原理为基础，建立了侧吹射流轴轨迹的数学模型。

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The tangential velocity distribution measured in this study is similar to a vortex core existing along the jet axis.

旋转射流的切向速度分布相当于射流中存在一个旋转的涡核。

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Based on the Phoenix lander, the craft is tasked with giving us a peek beneath the planet's surface, armed with tools that include a geodetic instrument from the Jet Propulsion Laboratory, which will be used to calculate Mars' rotation axis, a seismic wave sensor and a subsurface heat probe, to measure the planet's internal temperature.

ENGADGET: NASA InSight tapped for Mars drilling mission in 2016