参赛者必须把双脚放在计时器感应区上以停止计时。
D4a Competitor must stop the timer by placing his feet onto the timer sensors.
在该装置的顶部，它有两个感应区，每一区域有16根感应针，并以4乘4的方式排列。
On its top, however, it has two pads, each with 16 pins arranged in a four-by-four array.
其中，一个感应区代表指针下的文字，另一区则告知浏览者有关随之而来的内容，比如是否是字母或句子末尾。
One pad represents the character under the cursor, the other gives the reader information about what is coming next, such as whether it is a letter or the end of the word.
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