1.However, he said: 'There is a big difference between a tourist and a long-term experienced observer.
不过，他说：“普通游客和长期蹲点经验丰富的观察者还是有着天壤之别的。”
2.This is the kind of "meat and potatoes" information amateur astronomers are eager to glean from an experienced observer.
这就是业余天文爱好者渴望从有经验的天文观测员那里得到的主要信息。
3.Henry Kaufman, a highly experienced observer of credit markets, suggests intense scrutiny of banks deemed "too big to fail" .
备受尊敬的信贷市场观察家亨利-考夫曼（HenryKaufman）建议，密切监视“大得不能垮台的”银行。