1N-UNCOUNT [oft with poss]嚴重懲罰The nemesis of a person or thing is a situation, event, or person which causes them to be seriously harmed, especially as a punishment. 嚴重懲罰
The new mathematics test will become the nemesis of teachers.
新的數學測試將會是對老師們的嚴重懲罰。
2N-COUNT 天敵A person's nemesis is their opponent or rival, especially one who has been their opponent or rival for a long time. 天敵
Sun Microsystems gave up its legal fight with Microsoft and agreed to cooperate with its longtime nemesis.