同根派生 black cottonwood相关词英汉例句双语例句A black bear cub peers from a Cottonwood tree after being scared up there by a visitor to the Whitewater Canyon nature preserve near Palm Springs, California.加利福尼亚棕榈泉附近的白水大峡谷自然保护区里面，一头年幼的黑熊被游人吓到后从一颗三角叶杨后面窥视。black cottonwood更多例句