He likes to speculate on the stock market.
他喜欢炒股。
Even to speculate on it is a gain.
即使思索一下也是一种收获。
If you want to speculate on the next bubble, it's up to you.
你是否想在下一轮泡沫中投机要由你自己决定。
He had hurried to speculate on stocks, but had made no money.
他急急地炒股票，一点钱也没赚得。
His physical condition was deteriorating, and he began to speculate on the matter of death.
他的健康状况日恶化，他开始考虑起死的问题。
That, they speculate, was the first step on the pathway to life on Earth.
他们推测，是通向地球上生命的第一步路径。
That, they speculate, was the first step on the pathway to life on Earth.
他们推测，是通向地球上生命的第一步路径。
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