But just some 22,000 birds remain today, occupying about 16% of the species’ historic range.
但如今仅剩下约2.2万只鸟类，占据了该物种历史分布范围的约16%。
Fundamentally, the USPS is in a historic squeeze between technological change that has permanently decreased demand for its bread-and-butter product, first-class mail, and a regulatory structure that denies management the flexibility to adjust its operations to the new reality.
从根本上说，美国邮政服务局正处于历史性的困境之中，一方面是技术变革永久性地减少了其核心产品——一等邮件的需求，另一方面是监管结构剥夺了管理层根据新现实调整运营的灵活性。
例句取自历年考研英语真题，翻译为机器生成，仅供学习参考。