Even rudimentary feathers on forelimbs could have expanded the arm's surface area to enhance lift slightly.
即使是前肢发育不全的羽毛也能扩大手臂的表面积，以略微提高升力。
The expanded surface area means X1 users "can be less accurate" when they type, says Hill.
希尔表示，键体表面积的扩大意味着X1用户在打字时“可以不用很准确”。
The expanded surface area means X1 users "can be less accurate" when they type, says Hill.
希尔表示，键体表面积的扩大意味着X1用户在打字时“可以不用很准确”。
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