contract ['kɑntrækt] 词频1 词根: con

n. 合同;契约;协议;

💡 con共同+tract拉→共同拉回去→收缩；对大家都有制约→合同

"The offers for the contract were all in the same ballpark ."

近义：narrow, retrench, shorten, shrink, straiten, compress 反义：broaden, sack, terminate, boot, discharge, cashier

signature ['sɪgnətʃɚ] 词频3 词根: sign

n. 签名;署名;识别标志，鲜明特征;[医]药的用法说明;

💡 signa=sign记号 + ture表名词→签名

"On further examination it was found that the signature was not genuine."

近义：peculiar, typic, typical, vintage, characteristic, distinctive

sent [[sent]] 词频1

send的过去式和过去分词

近义：issued

mail [mel] 词频1

n. 邮件，邮政;邮政（制度）;邮务员，邮递员;〈古〉袋，旅行包; vt. 邮寄;给…穿盔甲; vi. 投邮;

💡 邮件要买（mai）一张（l） 邮票

"Deliveries of mail could be delayed because of cost-cutting."

近义：post, remit, send, ship, issue, letters