rainfall

Compared meaning: water falling from the sky (noun).

比较义项：从天空落下的雨水（名词）。

• rain

  The everyday, general word for falling water from the sky; used in ordinary speech and with verbs like 'fall' or 'pour'.

  日常、通用的词，指从天空落下的雨水；常与“下（雨）”“倾盆而下”等动词搭配，用于日常口语。

  The rain kept falling all afternoon, so we stayed indoors.

  雨整个下午一直在下，所以我们待在室内。

• rainfall 本词

  A more formal, technical term for the measured amount of rain over time in a place, typical in weather or statistics reports.

  更正式、技术性的词，指某地在一段时间内测得的降雨总量，常见于天气或统计报告。

  Annual rainfall in this region has dropped by 20 percent since 1990.

  自1990年以来，该地区的年降雨量已下降了百分之二十。

Rain and rainfall both relate to water falling from the sky. Rain is the everyday, general word, used in ordinary speech. Rainfall is more formal and technical, naming the measured amount of rain over time, common in weather reports.

这两个词都跟“雨”有关，但 rain 指自然现象本身——从天空落下的雨水，日常口语中最常用；rainfall 则更偏正式、统计性，指某地在一段时间内降下的雨水总量，常见于气象、地理报告中的数据描述。词库中两词都只给出了这一义项，没有其他需要排除的意思。