TASK DEFINITION: In this task, we ask you to elaborate the sentence without changing its general meaning. You can do so by explaining further the input sentence, using more precise wording, adding qualifiers and auxiliary information etc.
PROBLEM: During winter the lake water becomes well mixed , and the lake water is less clear because of tannins and calcium carbonate particles .

SOLUTION: During winter , the lake becomes well mixed , and recent research indicates that during this phase of the colour cycle , the lake is somewhat murkier due to the redistribution of tannins and calcium carbonate particles throughout the lake .

PROBLEM: In some cultures , Santa Claus brings coal to misbehaved children for Christmas .

SOLUTION: Some cultures hold that children who misbehave will receive only a lump of coal from Santa Claus for Christmas in their christmas stockings instead of presents .

PROBLEM: In embryo transfer , embryos are placed in a woman 's uterus .

SOLUTION:
Embryo transfer refers to a step in the process of assisted reproduction in which embryos are placed into the uterus of a female with the intent to establish a pregnancy .