safe-first criteria 安全第一准则
At the end, under the constraint of the loss of net returns, the paper studies a safe-first problem on the basis of the centroid, and gives the existence of conditions of the optimal solution.
最后，研究了基于形心向量的具有“净收益”亏损约束的安全-首要模型，并结合图形给出了最优解存在的条件，这一结果是对经典TSF模型的一个自然的推广。
参考来源 - 基于期望收益率排序信息的投资组合选择 （研究生论文）·2,447,543篇论文数据，部分数据来源于NoteExpress
First, make sure it's a safe thing for you to do.
首先，确保你这么做是安全的。
If you would like to start trampolining, you may first need to ask a doctor to make sure it's a safe activity for you.
如果你想开始玩蹦床，你可能首先需要请医生确保这对你是一项安全的活动。
You feel the pains of separation and you're tempted to turn back and run to that safe, warm place where you and your idea first met: the space between your ears.
你会体会到离别的伤痛以至于你会试图回到和你的创意第一次见面的温暖而安全的地方，这个地方就在你的大脑里。
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