- Adding the PQ additive with 2 times, to the addition condensation reaction of urea with formaldehyde, can reduce the content of free CH 2O and increase stability of UF resin adhesive .
- A cloud is a condensation of water vapour.
- She has two cars and in addition a motorboat.
- His shaving mirror was covered with condensation.
- The little girl is not very clever at addition.