The holes are only borings, less than a foot in diameter.
这些洞只不过是一些钻孔，直径不到1英尺。
新概念英语第四册 Lesson 13 The search for oil

📚 句中词汇解析

从本句中提取的重要词汇

diameter [daɪ'æmɪtɚ] 词频3 词根: meas
n. 直径，直径长;放大率;
💡 dia穿过，二者之间+meter测量→穿过两者之间测量→直径
"the diameter of a tree trunk"
树干的直径
近义：caliber
less [les] 词频1
adj. 较少的（little的比较级）;较小的;较次的，较劣的;较不重要的; adv. 较少地，较小地; prep. 减去;少掉;不足; n. 较少，较小;
"We aim to improve opportunities for the less advantaged in society."
我们的宗旨是为社会地位比较低下的人增加机会。
近义：least, lesser, minus
foot [fʊt] 词频1
n. 脚;底部;英尺(=12 英寸或 30。48 厘米);脚步; vt. 走，踏; vt.& vi. 结算，总计，共计;
"In a pinch, you could get home on foot."
在万不得已时, 你可以步行回家.
近义：subvene, defray, tootsy, tootsie, mount, rock
holes
n. 小孔；破洞（hole的复数）
borings
[机] 切屑

📚 更多「新概念英语第四册」例句

One can tell the difference almost at a glance, for a spider always has eight legs and insect never more than six.
人们几乎一眼就能看出二者的差异，因为蜘蛛都是8条腿，而昆虫的腿从不超过6条。
and the search for oil has done more to improve deep drilling than any other mining activity.
寻找石油比其他任何采矿业对改进深孔钻探作的贡献都要大。
As is so often pointed out, knowledge is a two-edged weapon which can be used equally for good or evil.
正像人们常常指出的，知识是一把双刃刀，可以用于造福，也可以用来为害。
ammunition and 400 people went sliding and crashing down to the port side of the steeply listing ship.
弹药和400个人轰地一声滑向陡斜的左舷时，
They may even accuse them of disloyalty,
他们甚至责备孩子不忠，
drawing the particle first towards the advancing wave,
先把微粒拉向前移的海浪，