Hydrogen is a very light gas that can help balloons fly high in the sky.

氢气是一种非常轻气体，可以帮助气球在天空飞得很高。

The naked tree stood stark against the winter sky, its branches bare and exposed.

光秃秃树在冬日天空映衬显得格外突兀，树枝光秃秃地露在外面。

The planet glows brightly against the dark night sky.

这颗行星在黑暗夜空明地发光。

The bright orange balloon contrasts sharply against the dark stormy sky.

明色气球在阴暗暴风雨天空形成鲜明对比。

The geese migrate south across the golden sunset sky.

雁群在金色向南迁徙。

The light grey sky was a very neutral color before the rain.

雨前，浅灰色天空是一种非常性颜色。

Children play on the freshly cut lawn under a bright summer sky.

孩子们在光明媚夏日蓝天，在新修剪草坪上玩耍。

The sky appeared a very neutral color before the rain.

雨前，天空呈现一种非常性颜色。

A massive sandstorm sweeps across the desert, turning the sky into a swirling sea of brown.

一场巨大沙尘暴席卷沙漠，把天空变成了翻滚棕色海洋。

The balloons dissolved high in the sky.

气球在高空渐渐消失。

The sky began to lighten after the storm.

暴风雨后天空开始放晴。

The wintry sun was already low in the sky.

一轮冬日已经低垂天幕。

For an ambitious young woman in this business, the sky’s the limit.

对于一个做这一行雄心勃勃年轻女士来说，发展前景无可限量。

The sky darkled at the approaching storm.

风暴来临前天空渐渐暗了来。

The sky clouded over before the storm.

暴风雨来临前, 天空乌云密布。

The sky clouded over; we could see there was going to be rainstorm.

"天空乌云密布,我们看得出快来暴风雨了。"

The sun shone on for hours in a cloudless sky.

天放晴了几个小时。

Only a tiny patch of blue was visible in the cloudy sky.

多云天空只见到一小块儿湛蓝。

Her voice was as overwarm as if she were coaxing a sky child.

她声音过分亲切，像是在哄害羞孩子。

A copter appeared in the sky above them.

一架直升机出现在他们上空。