The rise of these births may be linked to increased use of drugs to start or speed up labor and more births by Cesarean section.

VOA: special.2009.10.26

However, there are light arm troops made up of those too poor to be in the phalanx, who do use projectiles and the projectiles are arrows, javelins, or stones thrown by slings.

然而的确有轻装部队,由没法进入方阵的穷人组成,他们使用投掷武器,包括弓箭,投枪,或者绳索绑着的石头

耶鲁公开课 - 古希腊历史简介课程节选

And I use the term photon here, and that's because he also concluded that light must be made up of these energy packets, and each packet has that h, that Planck's constant's worth of energy in it, so that's why you have to multiply Planck's constant times the frequency.

我这里用光子这个词,是因为他还总结出光,必须由这些能量包组成，每个能量,包有这个h，普朗克常数代表,里面的能量，所以这就是为什么你们,要用普朗克常数乘以频率。

麻省理工公开课 - 化学原理课程节选