英语单词学习：voluntary
今天我们要学的词是voluntary。
Voluntary, 自愿的，主动的`。
"Virginia residents turned in almost 10,000 pounds of unused and expired prescription medication during a voluntary 'Drug Take-Back Day'," 在药物回收日那天，维吉尼亚州居民自愿上缴了将近一万磅没用过的和过期的处方药。
"General Motors initiated a voluntary recall covering 154,000 Cruze automobiles in the United States and Canada due to steering and transmission issues," 美国通用汽车公司宣布，因为驾驶和传动系统的问题，主动召回在美国和加拿大市场上售出的15万4千辆科鲁兹车。
好的，今天我们学习的词是 voluntary...