thousands of on vacation
on one hand on the other hand
more than three quarters of the population
English-spoken country find difficulty in doing sth
at night by day
fall asleep wake up
in a more natural environment at a common zoo
throughout the year close to
choose to do sth the best time to do sth
thousands of take a holiday on the one hand on the other hand
in excess of three quarters of the population
English-speaking countries have problems doing sth
in the night in the daytime
fall asleep wake up
in a more natural environment in an ordinary zoo
throughout the year close to
choose to do sth the best time to do something