在经典理论中，在黑洞的边界，即通常所称的事件穹界，光是不能逃逸的。
According to classical theory, at the boundary of a black hole-the so-called event horizon-light can no longer escape.
利用非线性规划理论建立了脉冲推力能量最省的逃逸轨迹规划模型，并考虑非球形摄动的影响对模型进行了修正。
By using the nonlinear programming theory, a optimal impulse satellite evasive trajectory planning model considering earth oblateness perturbation had been established.
新刑法对交通肇事罪进行了比较重要的修改，涉及到的“逃逸致人死亡”问题，在理论上争议颇多。
The relatively important amendments have been made to the crime of causing traffic accident in the new Criminal Law. As to the problem of "Death Caused by Escape", there are many disputes in theory.
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