Tom found a subterranean lake, shortly, which stretched its dim length away until its shape was lost in the shadows.
不久，汤姆发现了一个地下湖，它渐渐伸展，直到在黑暗中渐渐消失了。
2
She stretched herself out full-length.
她四肢完全伸展开。
《柯林斯英汉双解大词典》
3
They'd both looked down at the snake then, its eyes like two pebbles, its body all but indistinguishable from the length of rough wood it was stretched out on.