free surface conditions 自由表面条件
complex surface conditions 复杂地表条件
boundary surface conditions 边界条件
connecting surface conditions 连接边界条件
Due to the complexity of the surface conditions on Qinghai-Tibet Plateau, the precipitaion was certainly controlled by a lot of factors simultaneously. It is difficult to separate simply the effect of any factor.
由于青藏高原地表状况复杂，其上的降水显然应当同时受到各种因素的影响和制约，因此要简单地区分各因子的作用是较困难的。
参考来源 - 1998年夏季(7，8月)藏北降水的某些特征分析 ANALYSIS OF SOME FEATURES OF PRECIPITATION IN JULY AND AUGUST OF 1998 IN NORTHERN QINGHAI·2,447,543篇论文数据，部分数据来源于NoteExpress
Static correction is the key to seismic processing in areas with complex surface conditions.
能否有效地解决静校正问题是复杂地表地区地震资料处理的关键。
There have been improvements in surface conditions but not in fundamental weaknesses.
表面情况已有改善但根本的弱点依然如故。
Both the dynamic and kinematic free surface conditions are considered in nonlinear version.
自由表面上同时满足动力和运动的非线性条件。
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