Sudden weakness in one arm, facial drooping, and slurred speech are symptoms ______ stroke. Call 119 and get treatment as soon as possible. 「單手無力、臉嘴歪斜、口齒不清」為腦中風徵狀；發現時請趕快撥打 119並儘快就醫接受治療。
According to WHO documents, electromagnetic waves ______ base stations and mobile phones do not harm the human body. 根據WHO世界衛生組織文件，基地台及手機電磁波發出之訊號不會對人體造成危害。
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