alternate source短语¹³¹⁶²⁰⁺³ 基本例句 预备能源,第二资源 Create a plan B. Goldsmith suggests such backup plans as investing in a condo and having an alternate source of income from freelancing or teaching an extra class. 制定 B计划。戈德史密斯建议的后备计划就如投资分户出售的公寓大厦,以及收入中来自自由撰稿或者兼职授课的所得。 yeeyan