Plumbers
n. 管子工, 水暖工( plumber的复数形式 ); [美][口]（防止泄密的）堵漏人员
🗣️ 情景例句
while you're at work.
在你工作的时候。
I hope it'll be fine tomorrow.
我希望明天是好天气。
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。