Customers are thin on the ground at this time of year.

一年里这个季节顾客很少。

《牛津词典》

Red squirrels live high up in trees, while grey squirrels spend more of their time on the ground.

红松鼠生活在高高的树上，而灰松鼠则大部分时间生活在地面上。

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Hansel had seen no cat, but he stayed behind every time to drop a white pebble from his pocket on the ground as they walked.

汉斯没有看到猫，但他每次都留下来，在他们走的时候从口袋里掏出一块白色的鹅卵石扔在地上。

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The 11 chapters are chockablock with short profiles of career switchers who share their stories to inspire you and also give you a boots-on-the-ground feel for what it takes in terms of time, commitment and financial resources to succeed.

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Ms. BLATTER: We are tracking and monitoring in near real-time atrocities on the ground before they happen.

NPR: Satellite Tracks Human Rights Abuses

Recruits spend much of their time on parade-ground drill and firearms practice.

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