transparent ·adjective
Definition: If a substance or object is transparent, you can see through it very clearly. Level: B2
在透明塑料盒中种植球茎，这样孩子们就能看到根部的生长。
Grow the bulbs in a ___transparent plastic box, so the children can see the roots developing.
我们喜欢那里，因为天空是清澈的蓝色，大海是透明的。
We loved it there, because the sky was a clear blue and the sea was ___transparent.
玻璃窗是透明的，让光线容易通过。
The glass window is ___transparent, allowing light to pass through easily.