"a bad investment"
"high risk investments"
"anything that promises to pay too much can't help being risky"
"speculative business enterprises"
"a notional figure of cost helps in determining production costs"
"if someone saw a man climbing a light post they might get inquisitive"
"raised a speculative eyebrow"
Philosophy must have a practical..as well as a theoretical or speculative side.
All this is speculative,..a dubious guess.
出自： C. P. Snow
His..speculative eyes, the eyebrows raised in a perpetual questioning.
出自： N. Sherry