Perkins'reaction
[机] 珀金斯反应
🗣️ 情景例句
This all boils down to what?
煮到最后剩下……意味着， 表明是
Button holes are very hard to sew.
要缝钮扣洞非常难。
Do you think it's possible that it will happen?
你认为有可能建厂吗？