firsthand

After all, if you were going to spend your whole career climbing the ladder at one company, or two or three at the most, everyone who mattered already knew firsthand what you were good at.

毕竟，你的整个职业生涯都要在一家公司，或者最多两至三家公司里，一步步往上爬，你身边的所有人几乎都知道你擅长什么。

Our teachers took us on field trips to observe plants and animals, firsthand

老师带我们去野游，对动植物进行实地观察。

Based on recommendations from these specialists, as well as some firsthand tests, here are 10 notable robots that made their debut this year.

（Silicon Valley Robotics）”的商业团体的主管安德拉·凯伊（Andra Keay）。根据这几位专家的推荐和某些一手测评，这里给大家介绍十款今年首次亮相的超棒机器人。