1.run up 迅速成長
There is enough power to run up to four lights.
電力足夠帶起4盞燈。
When I began to compete again, I was struggling with my run-up.
當我重新參賽后,我要解決助跑這一項。
2.step up 加快速度;走上前去
The teacher called Dabao to step up the platform.
老師叫大寶走上講臺。
He urged donors to step up their efforts to send aid to Somalia.
他敦促各捐贈方加快速度將援助物資送往索馬里。