We recall that we stated explicitly at the outset the importance of punctual execution of this order and cannot help feeling surprised at your silence about our cable inquiry of the 6th November, a copy of which is enclosed.

【翻译】我们记得，我们从一开始就明确陈述了按期履行订单的重要性，而你们对我们11月6日的电询未做答复，我们不禁感到惊讶，现随函邮寄上次电询的复印件一份。

【简析】cannot help feeling surprised at your silence about our cable inquiry of the 6th November, a copy of which is enclosed.

1. cannot help feeling surprised：不禁感到惊讶。

2. your silence about our cable inquiry of the 6th November：你们对于我们11月6日的电询保持沉默。

3. a copy of which is enclosed. 是定语从句，which 指代our cable inquiry，a copy of which 意为“我们电询的一份复印件”。is enclosed：字面意思是“被装入信封”，意译为“随函邮寄”。