Sentence 1: In the specific case of cis alkenes where the two carbons have one substituent each , `` trans-disubstituted '' notation may be used .
Sentence 2: In the specific case of disubstituted alkenes , where the two carbons have one substituent each , the `` cis '' -- '' trans '' -- notation can be used .
Question: Do Sentence 1 and Sentence 2 express the same meaning? Yes or No?