Possible Clues:

• Huge plant spreading round island in gradual process of assimilation
• Huge female model admits one chemical process
• So it's the wrong way for the doctor to be gradually getting through to his little sister
• Maoist leader's penetration of moderate after revolution is a process of assimilation
• Quick learner's learning method
• With speed of light leaving universe is an absorbing process
• Learn by --- (take in effortlessly)
• The universe is losing carbon by diffusion
• Diffusion of liquids through porous partitions
• That so-and-so Sim will get through with the solution