black willow

同根派生

Black willow trees usually grow along lakes and streams, where they help prevent erosion (the wearing away of soil by water).
黑柳树通常长在湖畔及溪旁，能有效预防侵蚀((土壤受水冲刷并带走))；
Black willows have blackish-colored bark and are known to have several trunks on one tree.
黑柳树有黑色的树皮，而且同一株树拥有好几个树干；
He was in black from crew to earing.
他全身上下都穿着黑衣服。
He whipped up a pistol and shot at the black bear.
他急忙抓起手枪，向那头黑熊射击。
Many people were taken off by the Black Plague.
许多人被黑死病夺去了生命。