“Iron is a big concern because it affects brain development,” says Dr. Greene.
“因为铁影响脑部发育，所以大家特别关心它”，格林博士说。
"Iron is a big concern because it affects brain development," says Dr. Greene.
“因为铁影响脑部发育，所以大家特别关心它”，格林博士说。
They are big wheels because they are powerful. What they do affects many people.
他们之所以是“大轮”是因为他们有权势，他们所做的会影响许多人。
They are big wheels because they are powerful. What they do affects many people.
他们之所以是“大轮”是因为他们有权势，他们所做的会影响许多人。
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