会议的具体时间还未确定，目前仍显示为待定。

The exact time of the meeting is still ___TBD as it hasn't been confirmed yet.

医生在处方上写了t.d.s.，表示这种药需要每天服用三次。

The doctor wrote ___t.d.s. on the prescription, meaning the medicine should be taken three times daily.