Русско-английский научно-технический словарь
USAGE: есть основания полагать (или считать, или думать), что
• There is reason to think (or believe) that the stars ...
• It is reasonable to suppose that the value of the integral depends only on ...
• There are (good) grounds to believe (or for believing) that the Sarcosporidia may be fungi rather than protozoa.