工程师根据卫星图像估算洪水淹没的范围,误差仍需现场核实。Gōngchéngshī gēnjù wèixīng túxiàng gūsuàn hóngshuǐ yānmò de fànwéi, wùchā réngxū xiànchǎng héshí.The engineers estimated the area flooded from satellite images, though the margin of error still needs on-site verification.
我估算了一下,这次旅行大概要花两千块。Wǒ gūsuàn le yíxià, zhè cì lǚxíng dàgài yào huā liǎng qiān kuài.I made an estimate; this trip will cost about two thousand yuan.
老师傅看一眼就能估算出木头的重量。Lǎo shīfu kàn yì yǎn jiù néng gūsuàn chū mùtou de zhòngliàng.The old master can estimate the weight of the timber at a glance.