# For Optional values: waits until non-None and narrows the type
Юлия Сычева (корреспондент)
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分析：美以摧毀伊朗現任領導層背後的戰略是什麼？。关于这个话题，PDF资料提供了深入分析
On Tuesday, President Donald Trump said the US Navy will protect ships in the region "if necessary" in a bid to stop the energy supply crunch sparked by the war.