Pmo
abbr. printed matter only 只准印刷品
🗣️ 情景例句
Just the regular.
平信就好了。
I must concentrate on my new task.
我必须专注于我的新工作。
Shortly after this the famous H. M. S. Challenger expedition established the study of the sea-floor as a subject worthy of the most qualified physicists and geologists.
此后不久，英国著名的“挑战者”号舰艇对海底的那次考察，把对海床的研究确立为一个值得一流物理学家和地质学家从事的研究课题。