YOU SAID:
my duck laid an egg that looked like an egg laying a duck
INTO JAPANESE
私のアヒルは、アヒルを産む卵のように見える卵を産みました
BACK INTO ENGLISH
My duck laid eggs that look like eggs laying ducks
INTO JAPANESE
アヒルの産卵のように見える私のアヒル産卵
BACK INTO ENGLISH
My duck spawn looks like a duck spawn
INTO JAPANESE
私のアヒルのスポーンはアヒルのスポーンのように見えます
BACK INTO ENGLISH
My duck spawn looks like a duck spawn
That didn't even make that much sense in English.