abbreviated call letters的用法和样例：
- Winter in the north;the lonesome and bare tress call letters to the distance, while the beautiful snowflakes thrown in the copious fields soon become the vivacity of the spring .
- LCL professional, industry-wide good price advantage, please call letter from the inquiry wholeheartedly to serve you and hope to get your trust and support.
- The claims against the cargo insurers are based upon agreements contained in what are usually, and again inaccurately, called letters of guarantee.
- She responded to my letter with a phone call.