What does “descend on” mean in this video clip?

descend和ascend是怎么构成的?

Translate the following sentence into Chinese.We ascend and descend, a hill together.

Unit check one blank-filling-1 CTL: BAW309 report _______ PIL: _______ maintaining BA W309 CTL: BA W309 descend to ______ PIL: Leaving ______ for ______ BA W309 CTL: BA W309 direct to ______, descend to _______ on QNH ______ PIL: Direct to ______ descending to _______ QNH _______ BAW309 CTL: BAW309 descend now to _______ QFE _______ PIL: Roger descending to height______ QFE _______ BA W309

The plane began to ______. A: remember B: stare C: type D: descend

The plane began to ____________. A: descend B: descends C: descended D: descending

The<br/>parcel was sent to the wrong (). A: depression B: destination C: determination D: descend

The ceremony will _____ as soon as the minister arrives.( ) A: complete B: descend C: commence D: disperse

The school has a reputation for high standards of ________. A: principle B: principal C: discipline D: descend

I ______ the problem from my mind. A: dismiss B: depart C: descend D: distribute