不过，对于老鼠和猴子的研究发现似乎是延长人类寿命领域这个一度被视为边缘科学研究的一项具有标志性意义的进展。
But the mouse and monkey findings appear to mark the most substantial scientific progress yet in the search for ways to extend human life spans — once viewed as a fringe area of study.
本周我们之所以到了这里，是由于国会通过了与韩国等国家的贸易协定，这具有标志性意义，将帮助美国劳动者并让我们的经济取得更大的胜利。
We’re here because this week, Congress passed landmark trade agreements with countries like Korea, and assistance for American workers that will be a big win for our economy.
不管出于何种动机，日本央行本周采取了三项温和但具有标志性意义的措施。
Whatever its motivation, the BoJ this week took three modest but symbolic steps.
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