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- Metals expand when heated. 金属受了热就会膨胀。
- Metals expand when they are heated. 金属遇热则膨胀。
- Objects expand when heated and contract when cooled. 物体热则涨， 冷则缩。
- As a general rule,a body will expand when heated and contract when cooled . 一般说来，物体热涨冷缩。
- When heated, the metal expand. 金属受热时便膨胀。
- As a general rule, a body will expand when heated and contract when cooled . 一般说来，物体热涨冷缩。
- It is a common physical phenomenon that substances expand when heated and contract when cooled. 物体遇热膨胀，遇冷收缩，这是一种普遍的物理现象。
- The air in the balloon expands when heated. 当气球受热时，里面的空气就会膨胀。
- We take it for granted that air expands when heated. 空气受热时膨胀;我们认为这是理所当然的.
- Metals undergo expansion when heated. 金属加热时会膨胀。
- Water does not always follow the rule that everything expands when heated and contracts when cooled. 水并不总是遵循物质热胀冷缩的规律。
- Metals expand with heat. 金属遇热膨胀。
- Air expands when heated. 空气受热膨胀。
- When heated,gases expand as liquids and solids do . 气体受热时，象液体和固体一样会发生膨胀。
- When heated,gases expand as liquids and solids do. 气体受热时，象液体和固体一样会发生膨胀。
- When heated, gases expand as liquids and solids do. 气体受热时，象液体和固体一样会发生膨胀。
- Water can be changed into vapour when heated. 水被加热时，可以变成水蒸汽。
- Water can be changed into vapor when heated. 水被加热时，可以变成水蒸汽。
- A tyre expands when you pump air into it. 轮胎一打气就鼓起来。
- Metal expands with heat and contracts with cold. 金属热胀冷缩。
