plain造句

Pregnancy wasn't all plain sailing and once again there were problems.
孕期并非一帆风顺,这不,又出现问题了。

He wore a plain blue shirt, open at the collar.
他穿一件素净的蓝色衬衫,领口敞着。

Is it love of publicity or plain stupidity on her part?
她是喜欢抛头露面,还是太过愚蠢了呢?