=1

大雪

Dàxuě

Daxue or Great Snow, 21st of the 24 solar terms 二十四节气 7th-21st December

=1

大雪

dàxuě

heavy snow

2

降低

jiàngdī

to reduce; to lower; to bring down

=3

了

le

(completed action marker) (modal particle indicating change of state, situation now) (modal particle intensifying preceding clause)

=3

了

liǎo

to finish (used with 得 dé or 不 bù after a verb to express (im)possibility, as in 忘不了 wàngbuliǎo "cannot forget") (literary) (usually followed by a negative such as 无 wú or 不 bù) completely (not); entirely (not); (not) in the least to understand clearly (variant of 了 liǎo)

=3

了

liǎo

(of eyes) bright clear-sighted to understand clearly

=3

了

liào

unofficial variant of 瞭 liào

4

能見度

néngjiàndù

visibility