n (1)(男)伙伴，(男)同(事)伴(male fellow worker，companion or friend)[C](infml)(构成复合词)：We've been old～s for years.我们是多年的老同事。He had a drink with his～after work.他下班以后与工友一起喝了几杯。〖同〗pal，friend，companion;

(2)助手(young person who helps a skilled worker;partner)[C]：a carpenter's/plumber's/builder's/surgeon's～木工/管工/建筑工/外科医生的助手;needs more help from one's～to finish the job需要助手更多的帮助以完成工作;

(3)(商船船长的)副手(officer on a merchant ship ranking below the captain)[C]：the first/second/third～(=first/second/third officer)大/二/三副;The～gave orders to swab the decks.大副命令擦洗船板。

(4)一对鸟(兽)之一(an animal's sexual partner，either of a bird or an animal)[C]：Swans keep the same～throughout their life.天鹅一生无异偶。

→′roommates 室友;′classmates 同学;′teammates 队友;′playmates 玩伴;

v 交配(尤指动物)(cause bird，animals to come together for breeding)[I，I+prep(with)，T+n，T+n+prep(with)]：The bears have～ed and produced a cub.熊交配后产下一仔。The majority of amphibians～in winter. 大部分两栖动物在冬天交配。Many animals～in spring.许多动物在春天交配。an experiment in which mice are～d with rats 鼠与大鼠交配的实验;～cats让猫交配;～a blue bird with a yellow one让蓝鸟与黄鸟交配;Some vigorous mature rams～successfully with nearly 100 ewes in a season.一些体力充沛的成年公羊在一个季节内能交配100头母羊。the～ing season/call(动物)交配季节/交配呼叫;

→′mating n(鸟，兽的)交配(尾);′mateless adj 无配偶的