twelfth
pron, det 12th; next after eleventh 第12, 第十二(个). ,twelfth `man (in cricket) reserve player (板球的)预备队员, 替补队员. ,Twelfth `Night night before the feast of the Epiphany, formerly celebrated with festivities 显现节的前夕(旧时有庆祝活动). n one of twelve equal parts of sth 十二分之一.
He did a lot of research and travelled around the USA looking for information about his ancestors.
他做了大量的研究,在美国跑了许多地方,了解有关祖先的情况。
Professor Karl von Frisch, an Austrian scientist, spent many years of his life researching the amazing ways honey bees communicate in their dark hives.