presents difficulties翻译

presents difficulties的基本解释

读音: 美: 英:

当前困难：指在某个特定时期所面临的问题和挑战。

例句

This presents difficulties for most conventional optimization methods, which need derivative information of the objective function.这对于需要目标函数的导数信息的传统优化方法是很困难的。
The scheme presents difficulties both for the people in charge, many of whom were recruited from software firms, and for the private contractors who are doing much of the work.括号较多。 建议：对计划负责人（其中许多人从软件公司招募而来）和承揽大部分具体工作的私营承包商而言，此计划都是困难重重。
I had not yet learned the discipline to apply myself to unpleasant tasks (even today, nearly thirty years later, it presents difficulties), so my grades were a perfect reflection of my obsessions.(不过直至今天，差不多过去三十年了，要做到这一点还是有些困难。)所以我在大学的成绩正好完美地表现了我的某些嗜好。
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