4ADJ-GRADED (论证或理论)循环论证的 A circular argument or theory is not valid because it uses a statement to prove something which is then used to prove the statement. (论证或理论)循环论证的
5N-COUNT (同时发送给很多人的)广告印刷品,通告 A circular is an official letter or advertisement that is sent to a large number of people at the same time. (同时发送给很多人的)广告印刷品,通告
The proposal has been widely publicised in BBC-TV press information circulars sent to 1,800 newspapers.