Upgrading
v. 升级；提高品位（upgrade的现在分词）
✅ 同义词
🔴 反义词
🗣️ 情景例句
Doesn't it look just right on Susan? Susan
戴起来正好， 不是吗?
No, the two sides are still in conflict.
没有,双方仍然有矛盾。
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。