Would you please tell me your phone number so that we'll ring you up as soon as the remittance arrives?
您能否把电话号码告诉我,以便汇款一到就给您打电话?
But here we come up against the most difficult of all obstacles to contact with people on other planets ----the astronomical distances which separate us.
然而,在和外星人联系中我们遇到的最大困难是分隔我们的天文距离。