vocabularies
手がかり
clue
ハチの巣
honeycomb
because of
～のために
to copy something because you think it is good
imitate
Producing something by imitating things from nature
くちばし
beak
6角形の
hexagonal
Ａ だけでなく Ｂ も
not only A but also B
the best of most suitable for a particular purpose
ideal
magic tape
burdock seeds
air resistance
空気抵抗
まだ見ぬ宝、未知の宝
stick to
～にひっつく
a big soud and the energy produced by something such as a bomb
explosion
long nosed design of bullet train
the shape of the long beak of Kingfisher
しみ、よごれ
stain
構造
～に成功する
to use something for a practical purpose
painless needle
creature
生き物
向上させる
improve
be composed of
～からできている
to change gradually over a long period of time
evolve
new wall materias that does not stain easily
and is simple to clean
the shell of a snail