改編歌詞 (EP. 2)

又來我的另外一些改編歌詞：
1. Acid and alkali （原曲：小太陽）（這首是2016-17年度寫的）
Acids have a sour taste,
Fruits and care products have them,
They turn blue litmus paper red,
pH less than seven,
Alkalis are slippery,
They have a bitter taste,
They turn red litmus paper blue,
pH more than seven.
They are both corrosive,
We should handle them with care,
Wear your safety goggles,
And please never taste them,
Natural indicators are plants,
Show different colour in each,
pH paper can be used to find
How acidic or alkaline it is.

2. Tooth Structure (原曲：小幸運）
Enamel is the hardest part of the crown,
It is non living and made of calcium salts
Protects the tooth from wearing down
As a result of chewing.
Around roots it is replaced by cement,
Fibres from it pass through the membrane,
They form the periodontal membrane
Fix the tooth to the jawbone.
Dentine is the middle region of the tooth
Also bone-like but softer than enamel,
There are strands of living cytoplasm running through it,
*Pulp cavity contains living cells, blood vessels and nerve fibres
Blood vessels supply oxygen and materials to the tooth and remove wastes from it
The nerve fibres can detect temperature and pressure.
(重唱*)

3. Causes of landslides in HK (原曲：Silent is Golden)
1. Landslides happen mainly in summer, when there is always heavy rain,
It will cause the soil to increase its weight, so cohesion and friction will lose.
副歌：Landslides are frequent, often in Hong Kong,
Landslides are frequent, frequent, often in Hong Kong.
2. Hong Kong's hills are made up of granite, they are a kind of soil and rock materials,
In hot, wet climate they will become soft and loose, so the shear strength will decrease as well.
3. Slopes are so steep, gravity increases, the gradient continues to increase,
And if I tell, shear stress will increase, and the rocks will start to fall down!
4. Humans carry out activities on slopes, they cut them down to build roads and buildings,
The slope's gradient will go up and the shear stress will increase as well.
5. If trees are cut, vegetation is gone, so the shear strength will go down,
If man-made slopes are managed badly, water seeps the soil through the cracks.