:
:
,
13. . , ( , ) ().
. , . :
a tree [tri:] =
: ()
---------------------------------------------------------------
.
Ø . , , , . , , .
Ø . 3 5 1 45, . (drilling), , , ; , , .
Ø , , . , :
It was a wonderful summer evening; the silence was only broken by a quiet song of
a nightingale sitting in the clump of honeysuckle.
; ,
.
, .
Ø . 15 , , 5- . , !
2 3 , 2 30 . , .
XIX :
, .
:
, , 2 4 (.. 8 ), :
30 , (.. 7 ), :
Good Luck!