Front-back connection
[计] 正反面连接
🧩 词语组成解析
back
[bæk]
n. 背，背部;背面，反面;后面，后部;（椅子等的）靠背;
vt. 使后退;支持;加背书于;下赌注于;
vi. 后退;倒退;
adj. 背部的;后面的;以前的;拖欠的;
adv. 以前;向后地;
🗣️ 情景例句
78 percent of black high-school graduates are unemployed.
百分之四十八的黑人高中毕业生失业。
All our garments are now poly-cotton, which is stronger, needs little ironing, and allows variations in patterns.
现在我们的服装都是涤棉料的，质地坚韧，不用熨烫并且花样繁多。
Shortly after this the famous H. M. S. Challenger expedition established the study of the sea-floor as a subject worthy of the most qualified physicists and geologists.
此后不久，英国著名的“挑战者”号舰艇对海底的那次考察，把对海床的研究确立为一个值得一流物理学家和地质学家从事的研究课题。