你一定要确保汤姆和玛丽不再重蹈覆辙了。

You have to make sure that Tom and Mary don't do that again.

Source: Tatoeba

Sentence Composition

=1 you (informal, as opposed to courteous nín)
=1 you (Note: In Taiwan, is used to address females, but in mainland China, it is not commonly used. Instead, is used to address both males and females.)
2 一定要 dìngyào must
3 确保 quèbǎo to ensure; to guarantee
4 汤姆 Tāng Tom (name)
=5 old variant of
=5 surname He
=5
  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
  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 to complete a set in mahjong or playing cards
=5 huó
  1. to combine a powdery substance (flour, plaster etc) with water
  2. Taiwan pr. huò
=5 huò
  1. to mix (ingredients) together
  2. to blend
  3. classifier for rinses of clothes
  4. classifier for boilings of medicinal herbs
=5 (literary) harmonious (variant of )
=5 huo
  1. (obsolete on its own in Standard Chinese) warm
  2. warm
6 玛丽
  1. Mary or Marie (name)
  2. Mali
7 不再 zài no more; no longer
8 重蹈覆辙 chóngdǎozhé
  1. lit. to follow in the tracks of an overturned cart (idiom)
  2. fig. to follow a path that led to failure in the past
  3. to repeat a disastrous mistake
=9 le
  1. (completed action marker)
  2. (modal particle indicating change of state, situation now)
  3. (modal particle intensifying preceding clause)
=9 liǎo
  1. to finish
  2. (used with or after a verb to express (im)possibility, as in 忘不了 wàngbuliǎo "cannot forget")
  3. (literary) (usually followed by a negative such as or ) completely (not); entirely (not); (not) in the least
  4. to understand clearly (variant of liǎo)
=9 liǎo
  1. (of eyes) bright
  2. clear-sighted
  3. to understand clearly
=9 liào unofficial variant of liào