| 词汇 | frontiers-of |
| 释义 | the frontiers of somethingidiom C2 the limits of what is known or what has been done before in an area of knowledge or an activity: …的知识前沿；…的疆界 the frontiers of science and technology科技前沿 Describing the leading position ahead ahead of be in the front lineidiom be streets aheadidiom box seat front front-line frontier in the box seatidiom lead lead the field/pack/worldidiom leading edge pacemaker standard-bearer street the tip of the spearidiom tip trailblazer van |
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