For inspiration, watch the coaches prepare for daily tourist performances, in which they snap iron bars with their heads and break glass by throwing a pin at it.
观看教练准备日常教程的表演也是一种激励，他们会用头撞断铁棒，并投掷大头针击破玻璃。
To make crushed ice, put some ice cubes into a strong polythene bag, seal it tightly, then hit it with a rolling pin to break up the ice.
制碎冰时，放一些冰块在结实的聚乙烯袋，封紧袋口，用擀杖敲击打碎即可。
If it won't break, you can use a pin to prick it.
如果它不会破，你可以用针刺一下。
If it won't break, you can use a pin to prick it.
如果它不会破，你可以用针刺一下。
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