And adjusting concrete formulas takes a lot of time and safety testing.

调整混凝土配方需要大量的时间和安全测试。

It found four chemicals to be well above the level at which FDA guidelines call for further safety testing.

检测发现四种化学物质超标，食品和药物管理局的指导方针要求进行进一步的安全测试。

Do safety testing, then you test for effectiveness, then for efficiency.

做安全测试，然后测试有效性，然后测试效率。

Well, as more and more companies enter this race, the greater the pressure for everyone to go as fast as possible and sacrifice other important stuff like safety testing.

好吧，随着越来越多的公司加入这场竞赛，每个人都面临着越来越大的压力，要求他们尽可能快地前进并牺牲其他重要的东西，例如安全测试。