Submitted by admin on Tue, 04/22/2014 - 00:20
definition:
Seasonal movement of animals from one region to another;Movement of people to a new area or country in order to find work or better living conditions
sentence:
Seasonal movement of animals from one region to another:
This may be an important mechanism promoting the shoreward migration of larval invertebrates and fish.
Movement of people to a new area or country in order to find work or better living conditions:
The extensive rural-to-urban migration has created a severe housing shortage.
difficulty:
easy
toefl frequency:
3
toefl classification: