1. If you are using a touch screen on your device, controls should be large enough to be touchable by fingers. 如果设备上有触摸屏，上面的控件必须要足够大，可以让手指轻松无误地 触及 。
2. Note the finger-sized regions devoted to touchable areas on the screen and use of text hints to reinforce the interactions. 注意观察图中触摸屏上可触摸控制部件的尺寸，以及 文字的 使用提示信息，这些都增强了交互体验。
3. Illustrated with spectacular, touchable foils, this book helps children explore the world around them and discover the colors in nature. 还有漂亮的，可爱的插图。这本书可以帮助小朋友们探究周围的世界，和发现自然界的颜色。
英英解释
adj.
1. perceptible by the senses especially the sense of touch
