Matter is made of atoms and molecules. ??/'?t?m/ ??/?m?l?kju:ls/?
(be made of由…構成，由…制成→eg: The desk is made of wood.)
(be made of ? ?VS ? be made from)→
（be made of:看得出原材料，制作僅發生物理變化）→These desks are made of wood.
（be made from: 看不出原材料，制作過程中發生化學變化）→The paper is made from wood.
Water, for example is the H2O molecule.
This means that a molecule of water has 3 atoms.
A water molecule has 2 hydrogen atoms and one oxygen atom.??/'ha?dr?d??n/ ??/'ɑks?d??n/?
Substances like sugar have many atoms in their molecules. ?/'s?bst?ns/?
（substance和matter都是物質的意思，但substance是可數名詞，而matter是不可數名詞）
（這里的like=such as,例如）
A molecule of sugar has many atoms, including carbon, hydrogen and oxygen. ?/'kɑrb?n/
（low carbon低碳）

物質由原子和分子組成。
例如水是由水分子構成的。
這意味著水分子有3個原子。
水分子有兩個氫原子和一個氧原子。
像糖這樣的物質分子中有許多原子。
糖分子有許多原子，包括碳、氫和氧。

Matter is made of molecules, such as H2O, which is the water molecule.
Matter can be in one of three states: solid, liquid or gas. ???/'sɑl?d/ ??/'l?kw?d/
Water and ice are the same substance, but they are in different states.
These states depend on the temperature of the molecules. ?/?tempr?t??(r)/?
When we heat a substance, the molecules move faster and try to take up more space.
（try to do sth試著/設法做某事） （take up占據）
When we cool a substance, the molecules move more slowly.
When we cool a substance to its freezing point, it becomes a solid.
（freezing point冰點）（?boiling point沸點）

物質是由分子組成的，比如水分子H2O。
物質有三種狀態:固態、液態或氣態。
水和冰是同一種物質，但它們處于不同的狀態。
這些狀態取決于分子的溫度。
當我們加熱一種物質時，分子運動得更快，并試圖占據更多的空間。
當我們冷卻一種物質時，分子運動得更慢。
當我們把一種物質冷卻到它的冰點時，它就變成了固體。

In a solid, the molecules move very little.
Their positions are almost fixed. ?/f?kst/?
To be fixed means that their positions don't change.
If we heat the molecules, they move faster and away from each other.
The solid begins to melt, like ice cream on a hot day.

在固體中，分子很少運動。
他們的位置幾乎是固定的。
固定意味著他們的位置不變。
如果我們加熱分子，它們就會運動得更快，遠離彼此。
固體開始融化，就像在炎熱的日子里吃冰淇淋一樣。

At a certain temperature, a solid begins to change into a liquid.
（change sth. into sth.把…變成…）
The temperature (at which a solid changes into a liquid )depends on the substance.
句子主干是:the temperature(主語) depends on(謂語) the substance（賓語）.
括號里的是定語從句，都是用來修飾先行詞the temperature，
For water, the solid begins to change into a liquid when its temperature rises to above 0 degrees Celsius.
（rise to：上升到）
For some substances, such as steel, the temperature at which it becomes a liquid is much higher.
Steel often melts at around 1370 degrees Celsius. ?/melt/
（表示在幾度要用介詞at）

在一定的溫度下，固體開始變成液體。
固體變成液體的溫度取決于這種物質本身。
對于水，當它的溫度上升到0攝氏度以上時，固體開始變成液體。
對于某些物質，如鋼，它變成液體的溫度要高得多。
鋼通常在1370攝氏度左右熔化。

If we continue to heat a liquid, the molecules move even faster.
（continue to do:繼續做某事）
At a certain temperature, the liquid begins to change into a gas.
For water, the liquid begins to change into a gas at 100 degrees Celsius. ??/'s?ls??s/?
That is the boiling point of water.

如果我們繼續加熱液體，分子運動得更快。
在一定的溫度下，液體開始變成氣體。
對于水，液體在100攝氏度時開始變成氣體。
這是水的沸點.

Inside a star, such as our Sun, the temperature is very high.
（inside:在…里面）
Everything inside the Sun is a gas.
（inside the Sun在太陽內部 ? VS ? in the Sun在太陽下）
According to scientists, there are over 65 elements inside the Sun.??/'?l?m?nt/?
（according to根據）（scientist科學家；science科學）（over=more than）
These include oxygen and iron.
Over 90 percent of the Sun is hydrogen gas.

在恒星內部，比如我們的太陽，溫度非常高。
太陽內部的一切都是氣體。
據科學家說，太陽內部有超過65種元素。
其中包括氧氣和鐵。
太陽的90%以上是氫氣。