Scientists say the finding suggests Mars may have once held the right conditions to support life.

科学家表示，这一发现表明火星可能曾经拥有适宜生命生存的条件。

This is perhaps the glue that holds all these conditions together.

这也许是将所有这些条件结合在一起的粘合剂。

Astronomers say they've made a major discovery of planets orbiting a distant star which may hold the right conditions to support life.

有多颗行星围绕一颗遥远的恒星运动，而这颗恒星上可能具备孕育生命的条件。

Work arrangements that increasingly carve workers out of employee status, not only lessen employer's responsibilities, but make it all the more challenging to hold them accountable for labor violations, as well as unsafe working conditions.

越来越多地使工人脱离雇员身份的工作安排，不仅减轻了雇主的责任，而且使追究他们对违反劳动法以及不安全的工作条件的责任变得更具挑战性。