這毒藥用來治蟑螂很有效。

This poison is very effective in getting rid of roaches.

Source: Tatoeba

Sentence Composition

=1 這 zhè
  1. (pronoun) this; these
  2. (bound form) this; the (followed by a noun)
  3. (bound form) this; these (followed by a classifier) (in this sense, commonly pr. zhèi, esp. in Beijing)
=1 這 zhèi (coll.) this
2 毒藥 dúyào poison
3 用來 yònglái to be used for
4 治 zhì
  1. to rule
  2. to govern
  3. to manage
  4. to control
  5. to harness (a river)
  6. to treat (a disease)
  7. to wipe out (a pest)
  8. to punish
  9. to research
5 蟑螂 zhāngláng cockroach
6 很 hěn
  1. very; quite
  2. (also, often used before an adjective without intensifying its meaning, i.e. as a meaningless syntactic element)
7 有效 yǒuxiào
  1. effective
  2. in effect
  3. valid