yeild up可解作:to give up the control of or responsibility for something, often because you have been forced to:(交出的意思)
你的租約,可能是說到,當某事發生後(你並未說明),租客就需將上述單位、單位設施、傢俬等交出。
希望幫到你!
yield up --> literary to show or give someone something that has been hidden for a long time or is very difficult to obtain 泄露、揭示
e.g. --> Little by little, the universeyield up its many secrets.宇宙一點一點地顯露出許多秘密。
參考: LONGMAN DICTIONARY of Contemporary English(English-Chinese) Third Edition