At the same time, they mapped the composition of gut microbes for each participant.

同时，他们绘制了每个参与者的肠道微生物组成图。

It's going to measure the internal ocean with a radar that can penetrate the ice on top and use cameras and spectrometers to map the chemical composition and geology on the surface.

它将用可以穿透顶部冰层的雷达来测量内部海洋，并使用相机和光谱仪来了解木卫二表面的化学成分和地质情况。