It is important for reaching the quantum regime of the mechanical oscillator where thermal noise effects on the device become negligible .
It is important to reach the quantum regime of the mechanical oscillator , where thermal noise effects become negligible on the device .

Are these two sentences paraphrases of each other?
yes

The Flushing Line was opened from 40th Street to Queensboro Plaza -- Corona Plaza on April 21 , 1917 , with a local station at 103rd Street .
The Flushing Line was opened on April 21 , 1917 from Queensboro Plaza to 103rd Street -- Corona Plaza with a local station on 40 Street .

Are these two sentences paraphrases of each other?
no

'' Eurybia radula '' is present in every province of Canada east of and including Ontario and is also present on the French territory of St. Pierre and Miquelon .
'' Eurybia radula '' is present in all provinces of Ontario east and including Canada and is also present on the French territory of St. Pierre and Miquelon .

Are these two sentences paraphrases of each other?
no

Rich food sources , as long as they are evaluated as profitable , will be applied for by the scouts when they return to the hive .
As long as they are advertised as profitable , rich food sources will be evaluated by the scouts when they return to the hive .

Are these two sentences paraphrases of each other?
no