Our packing charge includes $1 for the drum, which sum will be credited on return.
包装费中有1美元是包装桶的费用,此费用在桶还给我们时可退回。
About once a month. Not too often, because neither of us has much time. We both have too much work to do.
大约每月一次。不太经常写信,因为我俩的时间都很紧。我们都有做不完的事。