翻译和例句:
……
……
……
……
……
……
The pebbles stay on the bottom while the raisins rise to the surface, sink, and then rise again. The carbon dioxide gas in the soda can lift the raisins while the pebbles are too heavy for it to lift. ……
Bubbles (泡泡) rise through the water, and it looks like it is boiling. In fact, they are bubbles of air pushing through tiny holes in the cloth. Water does not run downward through the cloth because a force called “surface tension” holds water in those tiny holes. ……
……
The ink spreads through the hot water faster than through the cold water, because tiny water molecules (分子) bump (撞击) into each other faster in hot water. ……
……
……
……
……
……
|
|
|