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sp＞sp3＞sp2 sp＞sp2＞sp3 sp3＞sp2＞sp sp3＞sp＞sp2 sp2＞sp3＞sp
attract people to move are obstacles to migration may affect migration may confuse those potential migrants
Tanks that can think as human beings. An institute or group providing solutions for some problems. A group of authoritative people. Scholars and professional men.
raise baby whooping cranes get human help find warmth and food lay eggs
follow airplanes south every year. learn to migrate on their own. live in Canada all year round. be unable to fly back.
encourage scholars to concentrate on their own specialisations allow scholars to Change disciplines more easily make scholars aware of problems outside their own field allow overworked scholars to relax
decide personal factors are the only influence on migrants outweigh intervening obstacles on migration work with intervening obstacles on migration
lead young cranes on their first trip south teach adult cranes how to fly breed cranes in special parks transport cranes to the North
SP＞SP2＞SP3 SP＞SP3＞SP2 Sp3＞SP2＞SP SP3＞SP＞SP2 Sp2＞SP3＞SP
sp3>sp2>sp sp>sp2>sp3 sp2>sp>sp3 sp2>sp3>sp sp3>sp>sp2
lead young cranes on their first trip south. teach adult cranes how to fly. breed cranes in special parks. transport cranes to the North.
sp³＞sp²＞sp sp²＞sp＞sp³ sp²＞sp³＞sp sp＞sp²＞sp³
raise baby whooping cranes. get human help. find warmth and food. lay eggs.
follow airplanes south every year learn to migrate on their own live in Canada all year round be unable to fly back
attract people to move are obstacles to migration may affect migration may confuse those potential migrants
SP＞SP2＞SP3 SP＞SP3＞SP2 SP3＞SP2＞SP SP3＞SP＞SP2 SP2＞SP3＞SP
sp>sp2>sp3 sp2>sp>sp3 sp3>sp>sp2 sp2>sp3>sp sp3>sp2>sp
decide personal factors are the only influence on migrants outweigh intervening obstacles on migration work with intervening obstacles on migration
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