151. be entitled to= have the right phrv. 有…权利
152. beckon= invite v. 招唤;引诱
153. become extinct= die out phrv. 灭绝
154. being= creature n. 生命
155. beneficial =advantageous a. 有益的
156. blossom= flourish v. 兴旺
157. blossom= thrive v. 兴旺
158. boast= puff v. 吹嘘
159. boast= exaggerate v. 吹嘘
160. bombard= assail v. 炮击;轰击
161. bombard =assault v. 炮击;轰击
162. bombard =strike v. 炮击;轰击
163. boom= expansion n. 激增;爆涨
164. boon= great benefit n. 利益
165. boost= raise v. 增加;提高
166. boundary= periphery n. 边界
167. branch =division n. 分支
168. breed= reproduce v. 繁殖;饲养
169. brilliant= bright a. 光辉的;明亮的
170. brittle= breakable a. 脆弱的
171. brittle= fragile a. 脆弱的
172. broad appeal =wide popularity a. 广泛的吸引力
173. broadly =generally ad. 大体上
174. broadly= extensively ad. 大体上
175. bulk= majority n. 大部份
176. bulk= large part n. 大部份
177. bulk =major part n. 主体
178. bulk= large portion n. 大部份
179. bulk= great quantity n. 大部份
180. burgeon= expand v. 急速成长