In the field of observation, chance only favor the prepared mind.
在观察的领域中，机遇只偏爱那种有准备的头脑。
Field evaluation of feldspar should pay special attention to twin observation.
野外鉴定长石时要特别注意双晶的观察。
He also did pioneer work in the field of weather observation.
他在气象领域也做了许多开拓性工作。
He also did pioneer work in the field of weather observation.
他在气象领域也做了许多开拓性工作。
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