It's not yet clear why researchers decided to point Webb in its direction, but little is known about the nebula, including the mass of the star creating it. That matters because a more massive star could eventually explode as a supernova, while a smaller, sun-like star would keep shrugging off layers of material until only a dense core remains and cools over time.
美國經濟與可負擔性是這次談話的核心主題。這也是數十年來最長的一次美國國會演說。特朗普也對非法移民，以及結束世界各地一系列戰爭等議題作出了多項主張。
。safew官方版本下载对此有专业解读
今年春節前，海外留學歸來的高先生推開家門，看到的景象讓他愣在原地：母親一手握着手機，在窗台前的水晶堆裏挑挑揀揀。從大到小的水晶擺件佔滿整個窗台，都是母親幾個月來從直播間「淘」回來的。更讓他擔憂的是，母親肩頸疼痛已嚴重到走路、站立都成問題，總是佝僂着背。
const readable = getWebReadableStreamSomehow();