Unconstrained here means that there wasn't strict control over the conditions of the experiment.

这里" 不受约束的" 意味着实验条件没有严格的控制。

Now the rules aren't strict and everything is becoming easier and about the prize money.

现在规则不那么严格了，一切都变得简单了，有奖金。

However, many critics say that these rules are not strict enough.

然而，许多评论家表示，这些规定不够严格。

Pollution control measures are either not strict or nonexistent, leading to choking clouds of smog.

污染控制措施不严格或不存在，导致令人窒息的雾霾。

That means my parents weren't strict but they had golden rules that could not be messed with.

这意味着我的父母并不严格，但他们有不容侵犯的金科玉律。