1. The "bad air" over the marshes was believed to be its cause, and this belief gives the disease its modern name, for the Italian words for "bad" and "air" are mala and aria.
    沼泽地带上面的“坏空气”被认为是导致疟疾发生的原因，这种观点赋予了这种疾病现在这个名字，因为“坏”和“空气”的意大利语分别是mala和aria。