吞服,知识,疲惫,吞了下去,中文，get downTo descend。下降To give one's attention。 Often used with to : 认真：给予注意。常与to 连用： Let's get down to work。让我们认真工作吧To exhaust, discourage, or depress:疲惫，泄气，压抑：The heat was getting me down。炎热使我精疲力竭To swallo ...