Scientists measured blood levels of the vitamin in a representative sample of 1, 766 people over 65 and assessed their mental functioning with a widely used questionnaire.
A fruit: everyday eat fruit contains vitamin fruitful novel 1, at least at the beautiful skin maintain will receive significant consequences.
一个水果：天天吃含维生素丰硕的新颖水果至少1个，终年保持会收到显著的美肤后果。
3
The reaction mixture then undergo esterification and rearrangement reaction to prepare 1-chloro-2-methyl-4-(acetyloxy)-2-butene, which is a important intermediate of vitamin A.