711. round the lock 日夜不停地
The deadline is coming, so she is working round the lock.
712. run down 撞倒，撞沉；减少
The boy was run down by a car yesterday.
The battery has run down.
713. run into 偶然碰见；遭遇(困难等)；共计，达到...之多；撞在...上
I was about to leave when I ran into Mr. White.
They have run into trouble while designing the new machine.
The number of miners killed in the accident runs into dozens.
714. run out(of) 用完，耗尽
Conditions are getting worse and supplies are running out.
715. run through 匆匆浏览；穿过
I ran through the options with him.
They ran through the forest in the dark.
716. run/take a risk 冒险
Money tempted him to take a risk.
717. search for 对...的搜寻
Why not search for reviews before you buy?
718. secure against/from 保护...使免于
Now my house is secure against burglary.
719. see off 给...送行
Bill will see off to the airport.
720. see to it that 注意，务必，保证
You will have to see to it that all the windows are shut when you leave.