拉森说，中东局势十分脆弱，正处于一个关键时刻。
Larson said that the Middle East situation is fairly fragile and stands at a critical moment.
“这是长距离飞行的不解之谜之一，”克拉森说。
"This is one of the unsolved mysteries of long-distance flights," Klaassen said.
拉森说，酒精能破坏细菌的细胞膜，导致细菌破裂。
'Alcohol ruptures their cell membranes — it causes them to explode,' says Dr. Larson.
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