For that reason, babies with l-TGA usually won't have any obvious symptoms at birth.

正是这个原因，患有L-TGA宝宝在出生时没有明显症状。

So transposition of the great arteries, or TGA —you might be able to guess— is when these two arteries swap locations.

所以大转位（TGA），顾名思义，就是指这两个换了位置。

This essentially means that d-TGA leads to death unless there is some way for blood between the pulmonary and systemic circulations to mix.

这就意味着，除非有一种方法可以将肺循环和全身循环血混合，否则d-TGA会导致死亡。

Ultimately the cause of TGA is unknown, but there are diseases and behaviors that are associated with higher risk of babies having TGA.

TGA病因目前未知，但是有很多疾病和行为是婴幼儿患TGA高危因素。

If the shunt is large enough such that the initial symptoms aren't noticed and the TGA isn't repaired, the heart can progress to congestive heart failure.

如果分流足够大使得最初症状没被TGA没有修复，就会展为充血性心力衰竭。

So in this case, unlike d-TGA, circulation is preserved and therefore sometimes this is called congenitally corrected TGA.

所以不像d-TGA，在这种情况下，正常循环被保留了下来，因此有时候又被称为先天矫正TGA。

Less commonly, babies can have levo-transposition of the great arteries, or l-TGA, with levo meaning that the aorta's primarily to the " left" of the pulmonary artery.

更少见地，宝宝可能会有左旋-大转位，即L-TGA，左旋意思是主主要位于肺左侧。

TGA winners are not determined by sales, rather, by a blended voting jury of over 100 global media and influencer outlets, who are given a 90 per cent weighting, and the rest from fans.

TGA 获奖者不是由销量决定，而是由超过 100 个全球媒体和影响力机构组成混合投票评审团决定，评审团占 90%，其余权重来自粉丝。

This isn't good, and this situation is actually called complete TGA, or sometimes dextro-TGA or d-TGA, dextro meaning " right" , since in this case, the aorta's in front of and primarily to the right of the pulmonary artery.

这种情况不太妙，被称为完全TGA，有时也叫右旋TGA或者d-TGA，dextro意思是右旋，因为这种情况下，主在肺前面并主要在肺右边。