V to cover, dab, or stiffen with gum 用胶覆盖、轻涂或使变硬
But if they are wrong, an already crowded city will simply gum up.
但如果他们错了的话，这个已经拥挤的城市肯定会更糟糕。
Antibodies are proteins that stick onto a pathogen and gum up its works.
从化学成分上来讲，抗体属于一种蛋白质，它通过与病毒结合以阻断病毒的感染能力。
The hitch is that syngas from waste is full of tarry residue that tends to gum up the turbine.
问题是垃圾里产生的裂解气夹带着焦油残渣会堵塞涡轮设备。
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