Every step forward requires testing the ground ahead for shifting sands.

Some measures are needed to secure the farmland against shifting sand.

需要采取措施使农田免遭流沙的侵袭.

We have planted trees as a hedge against shifting sand.

我们植树以防流沙的侵袭.

Historically, shifting cultivation was not limited to the tropics.

历史上烧垦农业并不限于热带.

The Croatian town of Ilok is a classic case of shifting populations.

伊洛卡的克罗地亚小镇就是人口不停流动的典型例子。

Men and women hurried by in long, shifting lines.

她感到这不断的人流,像生活的滚滚波涛, 在奋斗在逐利.

He was shifting about uneasily in his chair.

他在椅子上不安地动来动去.

He stopped, shifting his cane to his left hand.

他停了下来，将手杖移到左手。

He had been a rock in the shifting sands of her existence.

他一直是她曲折坎坷的生活中的主心骨。

He shifted the case from one hand to the other.

他把手提箱从一只手移到另一只手.

He nervously shifted his weight from foot to foot.

他很紧张,重心在双脚之间来回换.

He shifted his position from the horizontal.

他从水平姿势变换成其他姿势。

He shifted his weight and a twig snapped.

他挪了一下身体的重心，一根树枝咔嚓一声断了。

Wilson shifted ponderously in his chair.

威尔逊在椅子里费力地换了下姿势。

With infinite care, John shifted position.

约翰小心翼翼地挪动了位置。

Meg shifted uneasily on her chair.

梅格坐在椅子上焦躁不安地动来动去。

Puffing a little, Mabel shifted her weight onto her feet.

梅布尔喘了口气，把身体重心移到脚上。

He shifted his weight from one foot to the other.

他把重心从一只脚转到另一只脚上。

The woman detective shifted her stance from one foot to another.

女侦探改变了站姿，把重心从一只脚移到另一只脚。

The entire pile shifted and slid, thumping onto the floor.

那整整一摞东西动了一下后滑落下来，嘭的一声全掉到了地上。

Hyde shifted his weight and felt himself teeter forward, beginning to overbalance.

海德转移了一下重心，就感到自己往前倾，开始失去平衡。