Though earthquakes seem to strike with little or no warning, researchers have been searching for danger signs.
虽然地震来袭之前很少或者没有什么征兆，但是研究人员们还是在寻找一些危险信号。
2
Though this term may strike you as rather esoteric, it merely characterizes a component, or named instance, as being relevant with a given scope, otherwise known as a context.