At the suggestion of a picnic, the pupils were bursting with enthusiasm.是什么意思？

At the suggestion of a picnic, the pupils were bursting with enthusiasm.

听说要去野餐学生们都兴高采烈.

at

prep. （表示位置）在，在（某时间或时刻），以，达， 向，朝；n. 阿特（老挝辅币单位，100 阿特 = 1 基普）；

例句
Prices start at £13.95 a metre for printed cotton...
印花棉布以每米13.95英镑的价格起售。

the

art. 指已提到的人（物），指说话人与听者已知的人（物），用于独一无二的事物前，与形容词最高级和序数词连用；

例句
He did have a real knowledge of the country...
他对该国的确知之甚多。

suggestion

n. 建议，意见，暗示，联想，启发，微量；

例句
I will take the suggestion under advisement, and refer it to the board.
对于这项建议，我将咨询专家意见作周密考虑并且提交给董事会处理。

of

prep. 关于，属于…的，由…制成；aux. 助动词 [非标准用语、方言] =have [主用于虚拟语气]；

例句
He did have a real knowledge of the country...
他对该国的确知之甚多。

picnic

n. 野餐郊游，供野餐吃的食品，猪的肩肉，轻松的工作；vi. 去野餐，参加野餐，野餐式地用餐，在户外用餐；vt. 用野餐招待；

例句
It was completely refurbished in 1987, with the addition of a picnic site.
它在1987年经过了彻底翻修，加盖了一个野餐点。

Pupils

n. 学生( pupil的名词复数 )，瞳孔，弟子，门生；

例句
The selection of pupils for grammar schools was biased in favour of the middle-class child of a small family from a good area...
文法学校招生时偏向于录取来自好地段的中产阶级小家庭的孩子。

were

be的过去时复数和第二人称单数形式，有时代替 was,用于条件从句、动词 wish 之后等；

例句
Shops, houses, and vehicles were set ablaze.
店铺、房子和车辆全都陷于火海。

bursting

n. 爆裂，爆破；v. 爆炸( burst的现在分词)，突然发作，突然打开，挤满；

例句
But he was bursting with curiosity, and one day he just couldn't contain himself. 'What are you going to do?' he asked...
但他满心好奇，一天，他真的忍不住了。“你打算做什么？”他问道。

with

prep. 和，跟，随着，关于，和…一致；

例句
A waiter entered with a tray...
侍者端着托盘进来了。

enthusiasm

n. 热情，热忱，热衷的事物，宗教的狂热；

例句
I'm depressed by the bovine enthusiasm of the crowd's response.
人群毫无热情的迟钝反应使我感到很沮丧。