🧩 词语组成解析
door
[dɔr]
n. 门，户;出入口;一家[户];通道;
guard
[ɡɑrd]
n. 警卫;狱吏，看守;护卫队;防护装置;
vt. 保卫，守护;看守;加防护装置;谨慎使用;
vi. 警惕;警卫;
🗣️ 情景例句
Why advanced?
为什么是高级的？
Would you care for a cop of coffee?
要被咖啡吗？
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。