hydra
n
1 (in Greek mythology) snake-like monster with many heads that grew again if they were cut off (希腊神话中的)蛇怪(长著许多头, 斩去後能重新长出).
2 (fig 比喻) thing that is hard to get rid of; recurring problem 难以除掉的事物; 一再出现的问题.
🗣️ 情景例句
In my opinion, winter in Beijing is not very cold.