Examlex
Draw the Fischer projection of a threonine diastereomer,and label the chiral centers as R or S.
U.S. Exports
The outbound shipment of goods and services from the United States to other countries.
Import Quota
A limitation set by a government on the amount or value of a particular product that can be imported into the country.
Exports
Goods or services sold by one country to another, contributing to the selling country's national income.
Imports
Goods and services purchased from other countries, bringing them into a country's domestic market.
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