先天

xiān tiān inborn; innate; natural

下

xià down; downwards; below; lower; later; next (week etc); second (of two parts); to decline; to go down; to arrive at (a decision, conclusion etc); measure word to show the frequency of an action

之

zhī (possessive particle, literary equivalent of 的[de5]); him; her; it

忧

yōu to worry; to concern oneself with; worried; anxiety; sorrow; (lit.) to observe mourning

而

ér and; as well as; and so; but (not); yet (not); (indicates causal relation); (indicates change of state); (indicates contrast)

忧

yōu to worry; to concern oneself with; worried; anxiety; sorrow; (lit.) to observe mourning

， 后天

hòu tiān the day after tomorrow; post-natal; acquired (not innate); a posteriori

下

xià down; downwards; below; lower; later; next (week etc); second (of two parts); to decline; to go down; to arrive at (a decision, conclusion etc); measure word to show the frequency of an action

之

zhī (possessive particle, literary equivalent of 的[de5]); him; her; it

乐

lè happy; cheerful; to laugh

yuè music

Lè surname Le

Yuè surname Yue

而

ér and; as well as; and so; but (not); yet (not); (indicates causal relation); (indicates change of state); (indicates contrast)

乐

lè happy; cheerful; to laugh

yuè music

Lè surname Le

Yuè surname Yue