Maintenance regulation
[化] 保养规程; 技术维护规程
🧩 词语组成解析
🗣️ 情景例句
Can you hand me that ... please?
你能给我递过来……吗？
Have you got your cheque book with you?
您支票本带来了没有？
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。