especially y

That's because body text gets to break the consistency rule, especially if your heading fonts are serif fonts (serif fonts have the little squiggles, like at the end of the downstroke of the "y").

这是因为主体文本打破了一致性原则，尤其是当标题字体是serif字体的时候(serif字体有一些花体，比如字母“y”的最后一笔的末尾)。

Y branches is important in the integrated optical devices unit, it is widely used in modulator, optical switching, optical splitter devices, especially in high-precision FOG.

分支是集成光学中的重要器件单元，广泛应用于调制器，光开关，光分路器的器件中，尤其是作为中高精度光纤陀螺系统的核心器件。

The basic principles and simulation methods of a null-coupler-based OADM are studied firstly, especially in the crosstalk of a Y-branch structure and the coupling properties of a tilted grating.

论文首先研究了零耦合器型OADM器件的基本原理与设计方法，特别是Y分支的串扰特性与斜光栅的耦合特性。