Guess how much it weighs! "After several wrong guesses, the guide explains:" Before the screen is dipped into the vat it weighs three to five kilos, which is about what a new-born baby weighs. After the screen is taken out of the vat, though, it weighs 25 to 30 kilos, which is about what a first-grader weighs.
示範過程中解說員與小朋友一問一答，「不對，不對，答案是沒下水之前重三到五公斤，相當一個小嬰兒；然而一入了水卻變成二十五到三十公斤重，差不多是一個一年級小朋友的體重。