A simulated low-speed crash between comparably sized planetoids yields a pluto and a charon , plus an icy debris disk that could coalesce into a nix and a hydra .
An impact has long been suspected for the birth of charon , the largest plutonian moon , but canup ran impact simulations to show that nix and hydra , two much smaller satellites discovered in 2005 , may be debris from the same collision .
Gyms often outlaw cellphones in workout areas , and restaurants sometimes nix them . The los angeles public library system restricts use to lobby areas .
健身房也规定在健身区域不能使用手机；餐馆也发布禁制令了；洛杉矶公立图书馆也禁止在大厅使用手机。
Cut the butter into chunks , and let it stand at room temperature to soften ( nix the microwave idea entirely ) .
把黄油切成块，让它的室温软化（禁止使用微波炉）。
Telephony services such as skype could also be particularly affected , thinks professor andy nix , a wireless expert at bristol university .
