set on/uponsb
—phrasal verbwithsetverbuk/set/us/set/present participlesetting|past tense and past participleset
[often passive]
toattacksomeone
攻击(某人)
He was set upon by aviciousdog.他遭到了一只恶狗的攻击。
tosurroundorcatchsomeone andpreventthem fromescaping
围困(某人);堵截(某人)
As heleftthetheatre, thesingerwas set upon byfansdesperateforautographs.那名歌手在离开剧院时被疯狂的歌迷围住索要签名。