Man was evolved from an ancestor that was probably arboreal.人大概是从住在树上的祖先进化而来的.Squirrels are arboreal creatures.松鼠是栖于树上的动物.Koala is an arboreal Australian marsupial.考拉是一种澳大利亚树栖有袋动物。...
我感觉空虚无聊，充满挫败感。I felt empty and hollow; defeated.挫败感让我几近疯狂。I nearly went bonkers with frustration.警方挫败了匪徒抢劫银行的企图.The police frustrated the bandit's attempt to rob the bank....