She has a detailed knowledge of this period.（英译中)

The quality of service in this restaurant has improved a lot.（英译中)

This cloth has a pattern of blue and white squares.（英译中)

Which period of history are you studying？（英译中)

We have three periods of chemistry a week.（英译中)

She is new to this country.（英译中)

This computer has a 256K memory.（英译中)