★ KS3-HIST-INT-0001正面
A trigger (or spark)
提示It shares its name with the part of a gun that is squeezed.
为什么Historians separate the spark from the fuel. Long-term causes build up the conditions; this is what finally sets them off. An essay that explains only the last event has explained when something happened, not why.
★ KS3-HIST-INT-0001背面