1
If I choose not to return, my mother will remain an enigma, in the same way as the fire.
2
Despite widespread recognition of its therapeutic importance, the sterilizing properties of this 60-year-old drug remain an enigma given its rather poor activity in vitro.
3
After all these years, Yi Kong still remained an enigma to me.
4
What took place in the ensuing months still remains an enigma to us.
5
Even the conundrum of the watch remained an enigma no longer.
6
This strange and wondrous circumstance remains an enigma to the end of the narrative.
7
As for my father, he remains an enigma to me.
8
An enigma to himself, he remains an enigma for posterity.
9
However, the tight link between hexamerization and enzyme activity in NendoUs has remained an enigma.
10
Even now, more than 120 years after his death, Charles Stewart Parnell remains an enigma.
11
The molecular mechanism of this process, especially the interaction between synaptotagmin and SNAREs, remains an enigma.
12
Many people believed this story; but whether it was true or not has remained an enigma.
13
To many people, though, Rose remains an enigma.
14
Yet the man himself had remained an enigma.
15
But beyond that, the planet remained an enigma.
16
Despite having forever changed English life, language and culture, at home and abroad, Shakespeare remains an enigma.