例256　And if one received a grape without having to provide her token in exchange at all, the other either tossed her own token at the researcher or out of the chamber, or refused to accept the slice of cucumber.

【结构分析】本句是一个复合句，开始是if引导的条件状语从句，第一个逗号之后的部分是主句：the other either tossed her own token...or refused to...，其中包含并列的谓语，tossed和refused。本句的难点是找到主句的三个并列谓语refused，并判断出第二个谓语tossed被省略，也就是在out of the chamber前面这个动词。

【亮点回放】此句话的亮点在于三个并列动词的使用，either...or...or...这三个并列动词很经典。

【核心词汇】

received a grape　得到一颗葡萄

token　代币

in exchange　用来交换

tossed her own token at the researcher　就会将代币掷向研究人员

refused to accept the slice of cucumber　拒绝接受那片黄瓜

【参考译文】如果一只猴子根本无需用代币就能够得到一颗葡萄的话，那么另外一只就会将代币掷向研究人员或者扔出房间外，或者拒绝接受那片黄瓜。