Mr. Li, our import license was only running up to the middle of February, consequently we were not able to extend the validity of the letter of credit.

李先生，我们进口许可证的有效期到二月中截止，因此，我们无法延长信用证有效期。

youdao

The following day, Culver and the governors of 11 other Midwestern states sent a letter to leaders of both parties of Congress, urging them to at least extend the production tax credit for wind energy.

FORBES: Mr. Culver Goes To Washington