每日長難句 146

原句：

"Rats have been shown to engage in multiple forms of reciprocal help and?cooperation, including / what is referred to as direct reciprocity—/ where a rat will?help another rat / that has previously helped them." says Quinn.

【2020 英語二 Text 1】

生詞：

engage in sth. 從事某事，參加某事

multiple adj. 多樣的

reciprocal adj. 互惠的，互相給予的

reciprocity n. 互惠，互相作用

previously adv. 事先，以前

分析：

??主句：

"Rats have been shown to engage in multiple forms of reciprocal help and?cooperation, including…says Quinn

??從句：

• what is referred to as direct reciprocity

（賓語從句）

• where a rat will help another rat

（定語從句）

• that has previously helped them."

（定語從句）

譯文：

“有研究顯示，老鼠會進行多種形式的互助及合作，其中包括被稱為'直接互惠'的行為，即老鼠會幫助之前幫助過自己的另一只老鼠。”Quinn說道。