（五）核技术应用，是指放射性同位素和射线装置等非动力核技术在国民经济和社会发展各领域的应用。
u = urljoin(BASE, href)
。搜狗输入法2026是该领域的重要参考
pixels checkpoint list mybox
+start_url: str
In JavaScript, the natural primitive for "a sequence of things that arrive over time" is already in the language: the async iterable. You consume it with for await...of. You stop consuming by stopping iteration.