Unlike a thorn, a prickle can be easily broken off the plant because it is really a feature of the outer layers rather than part of the wood, like a thorn.

与刺不同，皮刺能够被轻易地从植物茎上剥落，因为它仅仅是植物外层的一种特征，而不像刺那样是树木的一部分。

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Do you know the reason behind? A single arrow can be easily broken, but assembled together, the arrows will be hard to destroy.

你们知道其中的道理吗？单独一支容易折断，聚集在一起就很难被摧毁。

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Conclusion: Sodium bisulfate as a catalyst is characterized by high activity and less assistant reaction, and can be easily broken down.

结论硫酸氢钠为催化剂，分离方便，副反应少，催化活性高。

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Unfortunately for snow enthusiasts, the model found that the fragile needle-like ice crystals connecting the two layers can be broken easily and separated by the weight of new snow or a skier.

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The hopeful news Dr Bearman's work brings is that it should be easier to stop the spread of sexually transmitted diseases through a teenage-type graph than an adult one, since the spindly chains of connection between individuals can more easily be broken.

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