When you park on the street, you have to feed the meter all day long.
如果你在街边停车，你就得整天都付停车费。
2
The major work of this thesis is to design and make a good LPDA(log-periodic dipole antenna)as the feed of the ten-meter parabolic reflectors at the Yunnan Observatory.
文中所作的主要工作是为云南天文台十米抛物面设计、制造一付好的对数周期偶极子天线（LPDA）作馈源。
3
The invention also provides a dry feed and reaction system and a method for calibrating the solid mass flow meter.