Hello everyone,
小朋友们大家好， 

just a quick “guide” – or more like explanation why there was a removal of the 3-caliber rule for HEAT shells in 8.9. What do patchnotes tell us?
这篇东西类似于“指南”—或者说更像是解释一下为什么在8.9中，HEAT的三倍口径碾压机制被移除了。补丁信息告诉了我们些什么？ 

– Removed the rule for HEAT shells that excludes ricochet if the shell’s calibre exceeds the armour thickness by 3 or more times.
移除了HEAT的三倍口径碾压机制，也就是弹药口径是装甲3倍以上，必定不会跳蛋的机制

– Deflection angle for HEAT shells changed from 80 to 85 degrees.
HEAT的偏转角从80°上升到了85° 

As you can see, the three caliber rule excludes ricochet, if the caliber of the gun exceeds the nominal (!) armor thicknes by 3 or more times. Note that three is included in this. What it means is that 90mm+ shells (or, to be exact, shells from a 90mm+ gun) cannot ricochet on a 30mm armor. This is called “overmatch”, or “overmatch by 3″ (there is also a 2 caliber overmatch, but that isn’t very important now, I will simplify for the sake of explanation). They always hit. However, does this mean they will penetrate? Of course not.
正如你所见，三倍口径碾压是必定排除跳蛋的情况的。这只会发生在炮管的口径超过了装甲的标注（！！）厚度三倍或以上。 注意，正好三倍也是包含在这个机制之内的。也就意味着一个90mm以上的弹药（或者说，90mm+的炮打出来的炮弹）在30mm的装甲上一定不会跳蛋。这叫做“碾压”，或者“三倍碾压”（也有一个两倍口径碾压，但是现在不是很重要，我是为了便于解释而简化了一下）。它们必定会击中装甲。然而这真的意味着它们会穿透装甲吗？当然不是。

You see, the entire situation was not very intuitive for a player. When a player is aware of the “no ricochet” overmatch rules, he can shoot at a 30mm armor with a 90mm gun under extreme angles and expect it to penetrate. After all, I have a 90mm gun and he has only a 30mm armor, that has to penetrate, right? Much to their surprise, the shell often does not penetrate. Why? Because at early ricochet angle (80 degrees), a 30mm the armor is effectively 172mm thick (and that’s only on one axis, so I should say “no less than 172mm”). At 85 degrees (well within the “no ricochet rule zone”) it’s already no less than 344mm.
你看，整个情况对玩家来说不是很直观。当玩家知道在碾压情况下不会出现跳蛋时，他会用自己的90mm炮在极端的入射角的情况下射击一个30mm厚的装甲，并期待炮弹会击穿。总的来讲，我的炮是90mm，他的装甲只有30mm，没理由打不穿，对吧？但是令他们惊讶的是，炮弹经常打不穿。为什么呢？因为在以前的跳蛋角度（80°），30mm厚的装甲穿深是等效与172mm厚的（这只是一个轴上的，所以我该说“不小于172mm”）在85°角的时候（在“无跳蛋规则区域”中），等效已经不小于344mm了。

I am sure you can see where this is going. Removing the 3 ricochet rule for HEAT shells (that have high penetration) and moving the ricochet boundary to 85 degrees assures that when a player hits a 30mm armor at 84 degrees, he’ll have to defeat 287mm armor (hard, but possible with tier 10 shells), while 85 degrees will already ricochet: the player would (even with a tier 10 gun firing HEAT) not be able to penetrate the armor at 85 degrees anyway, but he would hear “did not penetrate their armor” instead of “ricochet” and that’s not intuitive. Now, the player will hear “ricochet” and will know he didn’t do damage because of the extreme angle and not because of the armor thickness.
我确定你能看到这玩意的走向。把HEAT的三倍碾压机制给去掉了（HEAT的穿深又很高），把跳蛋角度调整到85°，也就是说玩家在84°入射角射击30mm的装甲时，他需要打穿一个287mm厚的装甲（很困难，但是10级车的炮弹有可能），在85°就会跳蛋了：玩家（就算拿10级炮发射HEAT弹）也不能在85°入射角的情况下大船撞击，但是他会听到“我们未能击穿他们的装甲”而不是“跳蛋了” ，容易让大家产生迷惑。现在，玩家应该听到的是“跳蛋了！”，他也会知道自己没有造成伤害，原因是入射角度的问题，而不是装甲的厚度。

I hope it’s clear for you folks. Or at least clearer 🙂
我希望这玩意对大家有帮助。或者，至少明白了点什么东西。