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The primary ingredient for a volcano is magma. Magma is what we call melted rock. When rocks melt at depth they become less dense than the solid rocks around them and therefore they rise to the surface of...
DNA is made of small subunits called bases that join together to form a long chain. The bases in each chain join to the bases in another chain to form a structure that looks a bit like a ...
The heart is an organ made of muscle in the centre of the chest. It's role is to pump oxygenated blood around the body to enable our functions to be carried out. During a heart attack, a section of the he...
The basic word order is: person (+ time) (+adverb) (+ place) (+negation) (+ modal verb) + verb (+ duration) + object where you can leave out the things in brackets： Some examples 我在花园喜欢踢足球 I like to play ...
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