Making matters worse: people with RA can have trouble brushing and flossing because of damage to fingerjoints.
更糟糕的是患风湿性关节炎的人可能会因为手指关节的损伤而无法很好的清理口腔。
2
He places sensors and cables in the molds and then pours in layers of three types of plastic with varying degrees of softness — for fingers, joints, and finger pads.
他将传感器和电缆置于模具中，然后分别为手指、指关节和指肚倒置3层软度各有差别的不同类型的塑料。
3
And fingerjoints hurt with the cold air and engine vibration.