当水果变软煮好后，就从火上端下来。When the fruit is mushy and cooked, remove from the heat.马上把平底锅从灶上端下来。Immediately remove the pan from the heat.把你的住址写在纸的上端.Write your address at the head of this page....
异染色质大部分是由短而重复的多核苷酸序列所组成的.Heterochromatin has shown to be composed largely of short repeated polynucleotide sequences.表现这种现象的染色体物质叫做异染色质.Chromosome material with exhibits of such behaviour is called heterochromatin.异染色质部分...