1. 奋发地：strenuous 奋发的 | strenuously 奋发地 | strep 链锁状球菌

2. 奋发地/热心地：strenuous /奋发的/热心的/有奋斗之必要的/激烈的/费力的/ | strenuously /奋发地/热心地/ | strep /链锁状球菌/

3. 强烈地：caterer 包办伙食者 | strenuously 强烈地 | apathy-apathetic 冷漠

4. 不屈不挠地：fascinate 迷住 | strenuously 不屈不挠地 | contemplate 沉思;注视

adv

1. in a strenuous manner
strongly or vigorously

e.g. he objected strenuously to the stand his party was taking