She traced a line in the sand.
她在沙地上画了一条线。
She spread a towel on the sand and lay on it.
她把一块浴巾铺在沙地上，然后躺在上面。
Until just recently, most of us thought the sand had come from an ancient mountain range fairly close by that flattened out over time.
直到最近，我们大多数人都以为这些沙子来自附近的一个古老山脉，它随着时间的推移逐渐变得平坦。
Two geologists discovered that about half of the sand from the Grand Canyon was actually once part of the Appalachian Mountains.
两位地质学家发现，约半数的来自大峡谷的沙子实际上曾经是阿巴拉契亚山脉的一部分。
We went for a walk along the sand.
我们去沙滩上散了散步。
He was loping across the sand toward Nancy.
他正穿过沙滩轻快地向南希跑去。
The children tumbled about in the sand pit.
小孩在沙坑里翻滚着玩。
I sometimes made little beds in the sand and stuck flowers in them.
有时，我会在沙地上做小花坛，在上面插些花。
He drew a circle in the sand with a stick.
他用枝条在沙地上画了一个圆。
Wendy, look at the turtles burying their eggs in the sand.
温迪，你看那些把蛋埋在沙子里的乌龟。
They plant trees in the desert area to keep the sand and protect the environment.
他们在沙漠地区种树来固沙和保护环境。
The sea may rise or the land may fall; either way the sand dunes will be gone in a short time.
海平面可能会升高，或者陆地可能会下降；不论发生哪种情况，沙丘都将很快消失。
The tide was going out, and the sand was smooth and glittering.
潮水正在退去，沙滩平坦，闪闪发亮。
You can enjoy a quick snack while your children cavort in the sand.
当孩子们在沙子里嬉闹时，你就能快快享用一份小吃了。
Diatoms of this species, sometimes called "commuter" diatoms, remain burrowed in the sand during high tide, and emerge on the sand surface during the daytime low tide.
这种硅藻，有时被称为“通勤硅藻”，在涨潮时留在沙土中，在白天退潮时出现在沙土表面。
The tracks of the large animal were clearly printed in the sand.
这只大动物的足迹清晰地印在沙滩上。
The rodent burrowed its way into the sand.
这只鼠掘洞钻进沙里。
原来是滑沙呀！
The pretty crabs dig into the sand.
可爱的螃蟹钻进沙子里。
Joe sat poking up the sand with a stick and looking very gloomy.
乔坐在那儿用棍子捅沙子，一副愁眉苦脸的样子。
The shelterbelt kept the sand in check.
防护林带挡住了风沙。
Its long eyelashes keep out the sand during sandstorms.
它长长的睫毛可以在沙尘暴来袭时挡住沙子。
Water bubbled up through the sand.
水从沙里冒出气泡。
I prefer to play volleyball in the sand.
我比较喜欢在沙滩上打排球。
He hopped down onto the sand and held up his arms.
他跳到沙滩上，举起双臂。
When the sea goes out, the sand stretches for a long way.
海水退潮时，沙滩延伸出很远的一段。
The caption reads, "As the sand advances, we retreat."
标题写着：“沙进我退”。
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