1.in the shade的意思比under the shade要更为广泛.
2.under the shade (of...) 在(...的)遮蔽下/在树荫底下
如：We camped under the shade of trees.我们在树荫下宿营.
3.in the shade 在阴暗处/在树荫下/默默无闻/使某人(某事物)相形见绌
如：Keep in the shade!待在树荫下!
The temperature is 30℃ in the shade.阴暗处的气温是30℃.
The actress still remains in the shade.这位女演员仍然默默无闻.
Your writing puts mine in the shade.我的书法比起你的书法来未免相形见绌.