за период
• The increase in the carbon dioxide was 43 parts per million over the same period.
• Within the span of fourteen years, scientists have studied many samples of this rock.
Русско-английский научно-технический словарь• The increase in the carbon dioxide was 43 parts per million over the same period.
• Within the span of fourteen years, scientists have studied many samples of this rock.
Русско-английский научно-технический словарь