龙塞，汉语词汇。 拼音：lóng sāi 释义：即龙城。泛指边远地区。
“在进化早期也能长到如此之大，中华暴龙是我们已知的唯一例证，”布鲁塞特说。
"This is the only example that we know of tyrannosaurs being really big early in their history," said Brusatte.
“从小型古暴龙向大型晚期暴龙的进化并不是一个平滑渐变的转变过程，”布鲁塞特说。
"These things didn't all form a smooth, gradual transition from small, older tyrannosaurs to big, more recent tyrannosaurs," said Brusatte.
为什么早期的恐龙幸存下来了，而鳄踝初龙却灭绝了？ 怀特塞德表示还没有找到原因。
Why the early dinosaurs survived while the crurotarsans perished is not known, said Whiteside.
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