in essence

The two things are the same in outward form but different in essence.

这两件东西外表形式一样, 但实质同。

Britain has promised Rwanda $100m in aid a year over the next decade, with only “light conditionality” (in essence, an understanding Rwanda will not reinvade Congo).

英国也承诺在今后的10年内，每年会向他们提供1亿美元的援助，但附带“轻微的制约性”（也就是说，就再次侵犯刚果而成共识）。

Crenshaw deciphered the algorithm of the twisting motion, known as helical klinotaxis, and assisted Nekton's team in applying it to the robots, in essence crafting a new guidance technology.

克伦肖解算出「螺旋状调转趋性」这种扭摆运动的运作法则，并协助耐顿研究所的团队设计机器人，基本上是要发展出一种全新的导向技术。