1. Two opposing scenarios, the "arboreal" hypothesis and the "cursorial" hypothesis, have traditionally been put forward concerning the origins of bird flight. 关于鸟类飞行的起源，传统上提出了两种对立的假设：“地栖说”和“树栖说”。
2. Even with snow on the ground, the high bushy understory is exposed; also snow and wind bring down leafy branches of cedar, hemlock, red alder, and other arboreal fodder. 即使地上有雪，高而浓密的下层植被也显露出来；雪和风也会吹落雪松、铁杉、红桤木多叶的树枝和其他的树木草料。
3. Squirrels are arboreal creatures. 松鼠是栖于树上的动物。
4. Monkeys live in an arboreal habitat. 猴子生活在树上的栖息地。
5. Koala is an arboreal Australian marsupial. 考拉是一种澳大利亚树栖有袋动物。
