My mother doesn't mind who comes to stay, she's very easy-going.
我母亲不在乎有什么人来往,她十分随和。
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。
Some of the bigger firms are engaged in researches which are of such general and fundamental nature that it is a positive advantage to them not to keep them secret.