[161] de unos cuatro pies, a matter of four feet. VARIANTS: De cuatro pies más o menos; de cosa de cuatro pies.
[162] See 81 and 159.
[163] se recoge. VARIANT: Recógese. See 152.
[164] el agua ... que se escurre. Note this construction with que, which should be translated into English by the present participle running.
[165] se escurre. Note that the particle se cannot follow the verb when preceded by que. Compare with 152 and 163.
[166] El agua, que se saca. Compare with 164.
[167] por medio de. See 20 and 38.
[168] por lo que, because of which; so that. Lo que and lo cual refer only to an idea and not to any definite person or thing. VARIANT: Razón por la cual.
[169] en medio de, in the midst of. VARIANTS: Entre; rodeado de.
[170] se guían, are trained. Note that in Spanish there is usually no distinction between the forms train themselves and are trained.