Matter is made of atoms and molecules. ??/'?t?m/ ??/?m?l?kju:ls/?
(be made of由…構(gòu)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(fā)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(fā)生化學(xué)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(zhì)的意思，但substance是可數(shù)名詞，而matter是不可數(shù)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(zhì)由原子和分子組成。
例如水是由水分子構(gòu)成的。
這意味著水分子有3個(gè)原子。
水分子有兩個(gè)氫原子和一個(gè)氧原子。
像糖這樣的物質(zhì)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(shè)法做某事） （take up占據(jù)）
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(diǎn)）（?boiling point沸點(diǎn)）

物質(zhì)是由分子組成的，比如水分子H2O。
物質(zhì)有三種狀態(tài):固態(tài)、液態(tài)或氣態(tài)。
水和冰是同一種物質(zhì)，但它們處于不同的狀態(tài)。
這些狀態(tài)取決于分子的溫度。
當(dāng)我們加熱一種物質(zhì)時(shí)，分子運(yùn)動(dòng)得更快，并試圖占據(jù)更多的空間。
當(dāng)我們冷卻一種物質(zhì)時(shí)，分子運(yùn)動(dòng)得更慢。
當(dāng)我們把一種物質(zhì)冷卻到它的冰點(diǎn)時(shí)，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(yùn)動(dòng)。
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(huì)運(yùn)動(dòng)得更快，遠(yuǎn)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(hào)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(zhì)本身。
對(duì)于水，當(dāng)它的溫度上升到0攝氏度以上時(shí)，固體開始變成液體。
對(duì)于某些物質(zhì)，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(xù)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(xù)加熱液體，分子運(yùn)動(dòng)得更快。
在一定的溫度下，液體開始變成氣體。
對(duì)于水，液體在100攝氏度時(shí)開始變成氣體。
這是水的沸點(diǎn).

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(yáng)內(nèi)部 ? VS ? in the Sun在太陽(yáng)下）
According to scientists, there are over 65 elements inside the Sun.??/'?l?m?nt/?
（according to根據(jù)）（scientist科學(xué)家；science科學(xué)）（over=more than）
These include oxygen and iron.
Over 90 percent of the Sun is hydrogen gas.

在恒星內(nèi)部，比如我們的太陽(yáng)，溫度非常高。
太陽(yáng)內(nèi)部的一切都是氣體。
據(jù)科學(xué)家說，太陽(yáng)內(nèi)部有超過65種元素。
其中包括氧氣和鐵。
太陽(yáng)的90%以上是氫氣。