交作業：

發現了那架波音 737 Max 9 在飛行中掉落的門塞的波特蘭科學老師Bob Sauer認為他後院的樹木可能幫助保存了證據，“樹木像安全氣囊一樣阻止墜落，所以它沒有猛烈撞擊地麵。”

Portland science teacher Bob Sauer, who found the Boeing 737 Max 9  door plug falling during the flight, believes the trees in his backyard probably helped preserve evidence. "the trees  like the airbag prevented door plug from falling hard , so it did not slam into the ground", he said.