空中英語教室 Really

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該讓孩子盯著螢幕多久的時間？　HOW MUCH SCREEN TIME?

該讓孩子長時間盯著螢幕嗎？

Can kids have too much screen time?

空中英語教室Good TV 網路收看

Grammar gym

You would be astonished at how fast it all adds up.

to add up
We need to add up the amount from each receipt to see how much we spent.

add up
mean:
to grow
to increase

example:
With all Henry has to do at the office and at home, it's no wonder he feels all that stress adding up.
If you don't take care of your money problems soon, your bills and debt are going to add up.