法律規定，在車輛和飛機上，一定要扣上安全帶。

It's the law: always buckle your safety belt in cars and airplanes.

Source: Tatoeba

Sentence Composition

1 法律 fǎlǜ law

classifiers: 條, 套, 個
2 規定 guīdìng
  1. to stipulate; to specify; to prescribe; to fix (a price); to set (a quota)
  2. regulations; rules; provisions; stipulations
3 在 zài
  1. to exist; to be alive
  2. (of sb or sth) to be (located) at
  3. (used before a verb to indicate an action in progress)
4 車輛 chēliàng vehicle
=5 和 hé old variant of 和 hé
=5 和 Hé surname He
=5 和 hé
  1. (joining two nouns) and; together with; with (Taiwan pr. hàn)
  2. (math.) sum
  3. to make peace
  4. (sports) to draw; to tie
  5. (bound form) harmonious
  6. (bound form) Japan; Japanese
=5 和 hè
  1. to compose a poem in reply (to sb's poem) using the same rhyme sequence
  2. to join in the singing
  3. to chime in with others
=5 和 hú to complete a set in mahjong or playing cards
=5 和 huó
  1. to combine a powdery substance (flour, plaster etc) with water
  2. Taiwan pr. huò
=5 和 huò
  1. to mix (ingredients) together
  2. to blend
  3. classifier for rinses of clothes
  4. classifier for boilings of medicinal herbs
=5 和 hé (literary) harmonious (variant of 和 hé)
=5 和 huo
  1. (obsolete on its own in Standard Chinese) warm
  2. warm
6 飛機 fēijī airplane

classifier: 架
=7 上 shǎng used in 上声 shǎngshēng
=7 上 shàng
  1. (bound form) up; upper; above; previous
  2. first (of multiple parts)
  3. to climb; to get onto; to go up
  4. to attend (class or university)
  5. (directional complement) up
  6. (noun suffix) on; above
8 一定要 yīdìngyào must
9 扣上 kòushàng
  1. to buckle up
  2. to fasten
10 安全帶 ānquándài
  1. seat belt
  2. safety belt