Climate models have always allowed for uncertainty. For decades, scientists have been certain of the direction of travel: towards increased heat, risk and instability. But how precisely the?crisis?would?manifest, in what order systems would break down, and how the knock-on effects would unfold,?remains?a subject for research and discussion.?Currently, there is a debate between experts about whether the pace of?global?heating is accelerating or stable. The?likelihood?of?vital?ocean?currents, known as the Atlantic meridional?overturning circulation, collapsing this century is also?contested. One new study has suggested that a tipping point could be approaching, and that the analysis of the Intergovernmental Panel on Climate Change has, in this respect, been too?conservative.

have always? 一直都? ? ? ；? uncertainty? 不確定? ?；?? instability? 不穩(wěn)定性? ?；precisely? 精確地? ；? ?manifest? v.顯示? ；? ?break down? 崩潰，分解? ；? ?unfold v.展開? ，展現(xiàn)出來?；? ?

pace? n.速度? ；? ? accelerating? v. 加速? ? ；? stable? adj.穩(wěn)定的? ? ；likelihood? n.可能性?

vital adj.至關(guān)重要的? ； current? n.水流，洋流? ?；Atlantic n.大西洋 ；? overturn? v.推翻??

circulation? ?n.循環(huán)，流通? ；? collapse? v.倒塌，崩潰? ?;? contest? v.爭論，競(jìng)爭? ，suggest v.表明? ?；? tipping point? n.臨界點(diǎn)? ；? analysis??n.分析? ?；? ?panel? n.專家小組? ;? in this respect? 在這個(gè)方面? ?conservative adj.保守的??