促进可持续发展，强调“对脱贫地区产业要长期培育和支持”；
Amy Peckham-Driver spent years in excruciating pain before she was diagnosed with endometriosis
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The cost of migrating a whole team to a custom thing can be expensive and time consuming. I'm definitely talking about this from the perspective of smaller / solo teams. But that said, speaking from experience, I know several middle-sized studios moving to custom engines because they have determined the potential risk of using proprietary engines to be too high, and the migration and learning costs to be worth it. I think using custom stuff for larger teams is easier now than it has been in a long time.
Poincaré disk model. Take the open unit ball \(\mathbb{D}^n = \{x\in\mathbb{R}^n \mid \|x\|