投機的英文：
to be opportunistic; to speculate in a risky adventure; to gamble

opportunistic是什么意思：
a. 机会主义的,投机取巧的

This corrupted loyalty is better described as complicity or opportunistic behavior.
或许一个更好地解释这种扭曲的忠诚的词应该是共谋或是机会主义。

You're a turncoat, a time-server, a shameful, unscrupulous opportunist
你是一个变节分子，是个趋炎附势之徒！是个肆无忌惮不要脸的机会主义者！

I pegged her as an opportunist. Why do you have me pegged as the rowdy one?
我把她视为机会主义者。为什么你认为我是行为粗暴的那一类人呢

speculate是什么意思：
v. 猜测，推断，推测；投机，做投机买卖

He ventured on a rash speculation.
他进行鲁莽的投机。

His conclusions are purely speculative.
他做出的结论纯粹是推测而来的。

Every induction is a speculation.
所有归纳推理都是一种猜测。

risky是什么意思：
adj. 危险的；冒险的，大胆的；有伤风化的

The risky film was banned.
那部有伤风化的影片被禁映了。

Horse breeding is indeed a risky enterprise.
养马确实是个有风险的营生。

It was a risky operation, but might buy more time.
这是一次冒险的行动，但也许能赢得更多的时间。