foot by foot的意思|示意

She ran up the twenty-two stairs, counting the eleven stairs stepped by her left foot, eleven with the other foot.

茱莉亚跑了二十二级台阶——她知道自己左脚踩了十一级台阶，右脚也踩了十一个，两项一家加，就得出了这个结果。

Face touching only went up 20%, but rate of foot waggling went up by an impressive 50% when participants were inspired by another foot waggler.

抓脸仅仅增加了20%，但晃脚的比例却惊人地增加了50%。

Notice that you started with a 4 foot by 8 foot piece of plywood.

先要找一块4x 8英尺的夹板。