Perfidiousness
背信弃义\\n叛卖
📖 牛津释义
perfidiousness
n [U].
🗣️ 情景例句
Mainly for the sports meet and also for sightseeing, I think.
主要是来参加运动会，我想也是为观光而来。
Honesty is the best policy.
诚实是上策。
Goodbye!
再见！