The "that were it not" part is especially strange for me. It is from a BBC article:
David Coulthard admits that were it not for safety improvementsin recent years, the accident - which saw Luciano Burti's Prost hit a tyre barrier at nearly full speed, would have been fatal.
Were it not for X... means If X were not there... or If X had not happened...
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Hole One a New SeeThe "that were it not" part is especially strange for me.In that case you need to learn a few alternate ways of framing if-clauses.