yes是什么意思：是的；yes and no说不准；也是也不是used when you cannot give a clear answer to a question。
yessir的意思中文翻译：是的。同义词adv.yea
yes什么意思：是的
柯林斯词典
1.CONVENTION（用于肯定回答）是的，对的
You use?yes?to give a positive response to a question.
'Are you a friend of Nick's?'—Yes.'...
“你是尼克的朋友吗？”——“是的。”2.ONVENTION?（用于接受提议或请求，或表示许可）可以，好的
You use?yes?to accept an offer or request, or to give permission.
'More wine?'—Yes please.'...“再来点酒？”——“好的。”
3.CONVENTION?（用于告诉对方其所说的话正确）对，是的
You use?yes?to tell someone that what they have said is correct.
'Well I suppose it is based on the old lunar months isn't it.'—'Yes that's right.'...“噢，我想这是按照旧制阴历来算的，是吧？”——“对，是的。”