Women represent 46 percent of the total U.S. labor force, and 40 percent of American households have female primary breadwinners.

美国主要劳动力中有46%是女性，同时美国40%的家庭中女性是顶梁柱。

Thus the total force between A and B would be twice the original force.

因此，A 和 B 之间的总力将是原始力的两倍。

STEM careers made up about 13 percent of the total U.S. work force in 2016.

2016 年，STEM 职业占美国总劳动力的 13% 左右。

Meaning that the total force from the floor on the ladder is 105 Newtons.

这意味着施加的力的总量 从地板到墙壁是 105 牛顿。

STEM careers made up about 13 percent of the total U.S. work force in 2016. However, the number of STEM-related jobs – especially in health and computer areas – has risen much faster than other areas for years.

2016年，STEM职业约占美国劳动力总数的13%。然而多年来，与STEM相关的工作，尤其是在卫生和计算机领域的工作，比其他领域增长得快得多。