n.懦夫，卑怯的人
adj.怯懦可鄙的

The dastard who stole the charity box deserves to be punished severely.
那个偷慈善箱的卑鄙小人应该受到严惩。
He was labeled a dastard for betraying his friends during their time of need.
他在朋友们需要帮助时背叛了他们，因此被称作无耻之徒。
Such dastardly acts of violence have no place in a civilized society.
这种卑劣的暴力行为在文明社会中是没有立足之地的。
It was a dastard move to spread rumors about her just before the election.
在选举前散布关于她的谣言，这真是一个卑鄙的举动。
The dastardly thief snatched the purse from the elderly lady and ran away.
那个无耻的盗贼从老妇人手中抢走了钱包然后逃跑了。
His dastardly behavior ruined the reputation of the entire team.
他那卑劣的行为毁坏了整个团队的声誉。
To abandon one's own family in times of crisis is a dastard act indeed.
在危机时刻抛弃自己的家庭，确实是一种可耻的行为。
The dastardly attack on the innocent civilians shocked the nation.
对无辜平民发动的卑鄙袭击震惊了全国。
Don't be a dastard; stand up for what you believe in, even if it's not popular.
不要做胆小鬼；即使不受欢迎，也要坚持自己所信仰的。
History will remember him as a dastard for his role in the betrayal of his country.
历史将会把他记载为一个因为背叛国家而臭名昭著的懦夫。