アラスカ航空の機体でボルト締付不足が発覚 ★英語ニュースの単語と読解ができれば資格･試験･仕事にも役立つはず★ 例文 Bolts in need of "additional tightening" have been found during inspections of Boeing 737 Max 9s, United Airlines has said. 文の…