• The semicircles grow smaller and more numerous, but they always add ( up ) to pi .
• Global reserves of fresh water add up to 37 million cubic kilometres.
• The semicircles grow smaller and more numerous, but they always add ( up ) to pi .
• Global reserves of fresh water add up to 37 million cubic kilometres.
Циммерман М., Веденеева К.. Русско-Английский научно-технический словарь переводчика. Russian-English scientific dictionary for translators. 2012