Rav Sheshet would turn his face away and study - But if you would ask, did we not say in Sotah (39b) - "What is meant by the verse 'And when it was opened, all the people stood' (Nehemiah 8:5)? Once the Torah scroll is opened, it is forbidden to speak even words of Torah." It can be said that there it is referring to speaking out loud, so as not to disturb the reading of the Torah, but here it is referring to learning quietly. And the fact that it states he "turned his face away" implies a chiddush (novelty) - even though he turned his face away, appearing like one who puts down the Torah scroll, it is still permitted. And the reason he turned his face away was in order to concentrate properly on his learning. And Rav Alfas (in the 4th chapter of Megillah) wrote that the BaHaG explained it is only when there are 10 others there that one is permitted to study. But if there are not 10 besides him, then no. And here it is discussing where there were 10 besides him. And further, Rav Alfas offered another answer - that Rav Sheshet was different since Torah study was his occupation. And we find this latter answer more satisfactory.

Verses twice and translation (Targum, i.e. Aramaic translation) once - Some explain that the requirement [of reading a translation] applies to foreigners in their (native) language, as it is like (Aramaic) Targum that sometimes explains the verses. Because, just as the (Aramaic) Targum explains [the verses] to the Amei Ha'aretz (literally, "People of the Land"), so too, foreigners understand [the translation of the verses] through their native tongue. However, this does not appear [to be a correct], since the (Aramaic) Targum explains items that cannot be understood from the Hebrew, as can be found in many places. [For example], Rabbi Yosef said, (Megillah 3a) "If it were not for the (Aramaic) Targum of this verse, I would not know what it is speaking of." Therefore, one should not recite [the translation] in any language the third time (i.e. after the verses are read in Hebrew twice), except for the language of the (Aramaic) Targum.