1. Wealthy investors are bringing up the real estate prices in this small city by overdeveloping the city.2. Wealthy investors are investing in new developments of the city, causing a real estate boom in the city.3. Americans often speculate heavily on real estate, with vast fortunes won and lost.
 bring up the real estate prices cause a real estate boom speculate heavily on real estatebring up the real estate prices = 把房價炒很高cause a real estate boom = 把房價炒很高speculate heavily on real estate = 用很短的時間買賣房屋，期待高報酬
When the police found my lost kid I felt so relievd.