So far no one has admitted planting the bomb.到目前为止，还没有人承认是自己放了炸弹。It's Tree Planting Day.今天是植树节.Tree planting is almost automatically confined to exotics.树木栽植几乎主动地局限于外来种.The Tree Council promotes tree planting.林木委员会倡...
When planting seedlings I prefer to mark out the rows in advance.种树苗的时候，我喜欢事先划出行来。The Tree Council promotes tree planting.林木委员会倡导植树造林。The boys scraped out a hollow place for planting trees.那些孩子挖了个坑准备栽树....
一些气球飞行家曾提到在舰上使用系留气球的问题.Some balloonists talked of using captive ', ballons from ships.为研究系留气球稳定性,建立了系留气球的三维非线性动力学模型.To stability analysis of tethered balloon, a three dimensional nonlinear mathematical model tethere...