excursionn.远足;短途旅行;【物】偏移,漂移,偏离;偏差,偏振
excretionn.排泄;分泌;排泄物
exculpate vt.声明无罪;
exculpate sb from a charge开脱(某人)的罪责
exculpate oneself from blame为自己辩解.
exculpate sb. from a charge申明某人无罪