Definitely: a way of emphasizing that sth is true and that there is no doubt about it 肯定；沒問題；當然；確實
I definitely remember sending the letter.
我記得這封信肯定發出去了。
‘Was it what you expected?’ ‘Yes, definitely.’
“那是你所期待的嗎？”“當然是?！?
‘Do you plan to have children?’ ‘Definitely not!’
“你們打算要孩子嗎？”“沒這個打算！”
Some old people want help; others most definitely do not.
有些老人需要幫助，有些老人卻根本不需要。

Senior: high in rank or status; higher in rank or status than others 級別（或地位）高的
a senior officer/manager/lecturer
高級軍官╱經理╱講師
a senior partner in a law firm
律師事務所的主要合伙人
a senior post/position
高級職務／職位
I have ten years' experience at senior management level.
我有十年的高層管理經驗。
Junior nurses usually work alongside more senior nurses.
初級護士通常和較高級的護士一起工作。
He is senior to me.
他的職位比我高。
The meeting should be chaired by the most senior person present.
會議應由在座的職位最高的人主持。