历时

lìshí

HSK 7

历时 — lìshí

1. to last; to take (time)

   这项工程历时三年才完工。 zhèxiàng gōngchéng lìshí sānnián cái wángōng — This project took three years to complete.

2. diachronic; over a period of time (used in compounds, e.g. 历时研究)

   这是一项历时研究，主要考察语言的历史变化。 zhè shì yīxiàng lìshí yánjiū zhǔyào kǎochá yǔyán de lìshǐ biànhuà — This is a diachronic study that mainly examines historical changes in language.