Help yourself
随便───casual;吃───eat
The boy was cheeky and casual.───那个小男孩有点放肆，随随便便的。
A casual observer would have taken them to be three men out for an evening stroll.───乍一看的话，还以为他们三人是晚上出来散步的。
a casual and conversational tone───不拘礼节的谈话语气
A sharp dresser, Wyatt is never seen in casual clothes.───怀亚特衣着入时，从未有人见过他穿便装。
He read love into her casual friendliness.───他把她偶然表示的友好误解为爱情.
Among her friends, casual dress and a relaxed manner are the rule.───她的朋友一般都衣着休闲, 举止也轻松随意.
We are the casual acquaintance of a long railway journey.───我们是在火车长途旅行中偶然结识的朋友.
Every movement, no matter how casual and spontaneous, needs to be worked out to the last detail.───对每一个动作，无论它显得多么随意和无意识，都不能放过一丝细节。
His eyes were angry, though he sounded casual.
He tried to look casual.
I bumped into a casual acquaintance in town.
It was just a casual remark—I wasn't really serious.
She usually wears smart/casual clothes.