专家通过人口结构推算,二十年后养老压力将显著上升。Zhuānjiā tōngguò rénkǒu jiégòu tuīsuàn, èrshí nián hòu yǎnglǎo yālì jiāng xiǎnzhù shàngshēng.Experts calculated from the population structure that pressure on elderly care will rise sharply in twenty years.
按目前的进度推算,这项工程明年年底就能完工。Àn mùqián de jìndù tuīsuàn, zhè xiàng gōngchéng míngnián niándǐ jiù néng wángōng.Judging by the current pace of work, this project can be finished by the end of next year.
天文学家推算出,这颗彗星大约每隔七十年出现一次。Tiānwénxuéjiā tuīsuàn chū, zhè kē huìxīng dàyuē měi gé qīshí nián chūxiàn yí cì.Astronomers calculated that this comet appears roughly every seventy years.