I must apologize to you for not answering your letter immediately.

必须为未即给你回信而向你道。

Shelley immediately wrote back to Sam, asking whether he knew a Lillian Feinsilver.

雪莱即给山姆回信，问他是认识一个叫莉莲·费西尔弗的人。

I wrote back to them immediately, thanking them for their kind invitation.

【write】即给他们回信，感谢他们的盛情邀请。

She wrote back immediately to let him know that, as long as she was not working, she would be available during the Christmas period, including Christmas Day, any timehe needed her.

她即回信告诉他，只要她不工作，她就会在圣诞节期间，包括圣诞节，只要他需要她，她就会随时待命。

He wrote back immediately: Heaven abhors wicked men.

他即回信说：天憎恶人。