· 长难句 ·

Astrophysicists working with ground-based detectors at the South Pole and balloon-borne instruments are closing in on such structures, and may report their findings soon.

· 词的处理 ·

astrophysicist /,æstrəu'fi:zisist/ n. 天体物理学家

ground-based adj. 基于陆地的detector / diˈtektə(r) / n. 探测器

balloon-borne 球载的close in on sb./sth. 逼近，靠近

· 句子翻译分析 ·

Astrophysicists working with ground-based detectors at the South Pole and balloon-borne instruments are closing in on such structures, and may report their findings soon.

译：天体物理学家使用南极陆基探测器和球载仪器，正在越来越近地观测这些结构，也许不久会报告他们的观测结果。

1. 句子主干为and连接的两个“主谓宾”结构，即：Astrophysicistsare/ are closing in on /such structures, and/ may report /their findings;

2. working with ground-based detectors at the South Pole and balloon-borne instruments 为主语“Astrophysicists”的后置定语，一般情况下，定语可以翻译为“的”结构，也可以译为单句(见译文)