an sperm is used to byproducts unwind sail
fore_and_aft_sail is sail. unwinding_dna_molecule is chemical_reaction. unwinding_dna_molecule is complete_separation. unloading_truck is translocating. unwinding_dna_molecule is uncoiling. unloading_projectile_weapon is unloading. unwinding_dna_molecule is opening_up. unloading_watercraft is translocating. staysail is fore_and_aft_sail. water_propeller is prop.